Deuces Wild 2 Installation & Setup Guide V1.1

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About Us

At Aces, we believe performance should be within reach for every car enthusiast. Born from a passion for hot rod technology, we push the boundaries of EFI innovation, empowering DIY builders and professionals alike. We do it "For the People" because we believe that achieving your dreams should never be exclusive.

Our commitment is simple: deliver exceptional products that inspire, at fair prices that make high-performance accessible. Whether it's your first EFI setup or your latest build, we're here to fuel your journey with precision, reliability, and cutting-edge technology.

We don't just build EFI systems, we craft experiences that ignite passion, break barriers, and bring the joy of customization to everyone. Performance should never be out of reach, and with Aces, it never is. Our goal is to give our customers the absolute best value for their money both in the short and long run, so that they can look back and be proud that they bet on Aces.

Backed by over 10 years of experience, a history of winning results, and an unwavering dedication to research and development, Aces is built for performance, designed for dreamers, and made for those who refuse to settle.

Built for performance. Designed for dreamers. Made for you.

1.0 Introduction

The purpose of this manual is to guide you through the installation and basic setup of your EFI System. It covers installation through initial start-up and includes essential troubleshooting steps to help you achieve a smooth, stable idle before moving on to driving.

This manual does not cover advanced setup, advanced drivability adjustments, or performance tuning. For further guides, diagrams, videos, and expanded troubleshooting resources, please visit our resource center at acesefi.com, where you can also connect with our support team during business hours.

This EFI system is designed to be easy to use for first-time users. This manual does not cover EFI theory in detail, but instead provides the steps needed to get the engine up and running quickly. The EFI system also allows the user to make more advanced tuning changes if desired.

1.1 Important Note

Depending on the type of kit you purchase, it may or may not include fuel systems or other components such as the fuel pump, fuel filters, fuel pressure regulator, fuel lines, manifolds and/or ignition components. Aces Fuel Injection offers complete kits, which can be purchased separately.

1.2 Parts List

This list applies to standalone systems only and does not include items or exchanges done during promotional periods or offers.

Item	Description	QTY	SKU
1	Deuces Wild 2 ECU	1	AS2031
2	Handheld	1	AS2009
3	Throttle Body Assembly	1	AM1005
4	Main harness	1	AH2019
5	Wide band O 2 sensor	1	AE1060
6	Coolant Temperature Sensor	1	AE1052
8	Air Cleaner Gasket	1
9	2300 Flange Gasket	1
10	Breather Stud	1
11	2" Grommet	1

2.0 Warnings, Notes, & Notices

⚠️ WARNING:Before disconnecting the battery, identify a clean, switched 12-volt ignition source. This source must provide 12 volts during cranking and when the key is in the run position. Always disconnect the battery before performing any work on the vehicle.

NOTE: Some installation and adjustment procedures may require an assistant. Ensure an additional person is present for safety reasons.

2.1 Critical Warnings

⚠️ WARNING: Failure to follow these instructions may result in an improper installation, which could cause serious injury, death, or property damage. Improper installation or misuse of this Aces product will void all warranties.

⚠️ WARNING: Installation, adjustment, and repair should only be performed by a trained mechanic with adequate experience in fuel and automotive electrical systems.

⚠️ WARNING: Aces EFI systems consist of multiple sophisticated components. Failure of a single component does not justify a warranty claim for the entire system. Individual components are available for warranty replacement.

⚠️ WARNING:To preserve the warranty, these installation instructions must be read and followed thoroughly. Failure to follow instructions can void the warranty and may result in serious injury or property damage.

⚠️ WARNING: The oxygen sensors in this kit are designed for use with unleaded fuel ONLY. Using leaded fuel will degrade the oxygen sensor, leading to incorrect oxygen readings and improper fuel delivery.

⚠️ WARNING: RTV silicone sealers can damage oxygen sensors. Ensure that any RTV silicone sealant used is compatible with oxygen sensor-equipped vehicles. This information should be clearly indicated on the RTV package.

⚠️ WARNING:Fuel vapors are heavier than air and can accumulate in low areas, where they may be ignited by sparks or flames, resulting in property damage, injury, or death. Always prevent fuel spills to eliminate this risk.

⚠️ WARNING: Work must be performed in a well-ventilated area. Do not smoke or have open flames nearby, as gasoline vapors are highly flammable and can cause explosions.

⚠️ WARNING: Aces EFI systems offer extensive adjustability, and proper setup and calibration are essential for safe operation. If you are not comfortable with engine fundamentals and EFI tuning, we recommend having the system installed and calibrated by an Aces authorized installer or qualified tuning shop. Our technical support team is also available at acesefi.com or +1 (423) 590-2237 to help answer basic installation, setup, and troubleshooting questions.

2.2 Calibration Responsibility Notice

All supplied Aces Fuel Injection calibrations, wizards, and tuning information are provided as starting points only. It is the responsibility of the end user to confirm that the calibration is safe for the intended use.

Aces Fuel Injection, Inc. holds no responsibility for engine damage resulting from the misuse or improper tuning of this product.

3.0 Introduction and System Requirements

3.1 Engine Requirements

Before proceeding with the installation, confirm that your vehicle meets the following engine and fuel system requirements:

● Engine is in sound mechanical condition

● Engine horsepower is up to 350, NA or boost application

● Engine is a 4-, 6-, or 8-cylinder

● Engine has a 2-barrel, 2300-style flange intake manifold

● Unleaded fuel only

● Any RTV silicone sealants used on the engine are sensor safe

3.2 EFI System Compatibility & Limitations

This EFI system is intended only for the applications listed in this manual. While it may be possible to make it work with other applications, and Aces may occasionally highlight such builds on social media or elsewhere in the spirit of ingenuity, doing so can void your warranty. Aces may be unable to provide customer support for systems used outside their intended applications, and performance cannot be guaranteed. The user assumes all risks when operating the system in unsupported applications. For complete warranty details, please review our warranty policy at acesefi.com .

3.3 Electrical System Requirements

● A clean 12V source direct to the battery.

● A clean 12V switched ignition source.

● A direct connection to the negative terminal of the battery for all ground circuits.

NOTE: Do not connect to the starter, alternator, or any other "dirty" voltage sources, as they can damage electrical components.

3.4 Fuel Delivery System Requirements

Fuel pressure directly affects how much fuel is delivered to the engine when the injectors are opened. Higher fuel pressure delivers more fuel during an injector opening event. Lower fuel pressure delivers less. It is critical that the fuel pressure matches the injector pulse widths required by the calibration for your specific application.

A complete high-pressure EFI fuel system must be installed for the Deuces Wild 2 System. The pump should be capable of supplying 255 liters per hour or 400 pounds per hour of fuel. The system requires a minimum of 43.5 PSI fuel pressure. Fuel pressure must be regulated between 43.5 PSI and 58 PSI. The system will not self-regulate fuel pressure and must be regulated by your fuel delivery system.

Required fuel system components:

● A 100 micron pre-filter (installed before the pump)

● A 10 micron post filter (installed after the pump)

● An EFI fuel pressure regulator (installed after the fuel rail)

3.5 Return Line Requirements

Your fuel delivery system may require a fuel return line to the tank. This depends on the location of the regulator and whether it is in-tank or external.

● If the regulator is external, a return line is required.

● Surge tank-style fuel pump modules also require return flow.

⚠️ WARNING: Some late-model vehicles originally equipped with a throttle body injection system may have a usable return line. However, the return line must not create a pressure restriction. Return line pressure should remain below 3 to 5 PSI and must be at least ⅜" in diameter. A restricted or undersized line can cause tuning issues.

⚠️⚠️ DANGER: Do not use vapor canister lines as fuel return lines. This can lead to fuel leaks, fire, or explosion, and may result in serious injury or death.

⚠️⚠️ DANGER: Proper installation of a return line may require complete removal of the fuel tank. This should be performed only by a qualified technician. Improper handling can cause an explosion or serious injury.

3.6 Minimum Tools Required For Installation

The following list is not comprehensive.

● Standard socket and wrench set

● Standard screwdriver set

● Standard allen wrench set

● Wire strippers

● Rags or shop towels

● Drill and assorted bit sizes

● Welder and PPE if welding the O2 sensor bung (not required when using a clamp-on method)

● Electrical connectors

● Up to a 2" hole saw (depending on ECU mounting location)

● Factory Service Manual for your vehicle and or engine

● Digital voltmeter

● Terminal crimping tool

An assistant is required for certain installation and adjustment procedures. For safety reasons, do not attempt to complete the installation alone.

4.0 Pre-Installation Steps

4.1 Removal of Existing Components

1. Disconnect the battery.

2. If applicable, remove the existing OEM system components according to your vehicle's Factory Service Manual.

⚠️ WARNING:Before disconnecting the battery, identify a clean, switched 12-volt ignition source. This source must provide 12 volts during cranking and when the key is in the run position.

4.2 General Checklist

☐ Conduct an inventory check to ensure you have all the necessary components and tools before beginning the installation process

☐ Ensure all mating surfaces are properly cleaned and sealed

☐ Ensure chassis and engine grounds are cleaned

☐ Make sure your battery is fully charged to a minimum of 12 volts and in good condition

☐ Ensure the vehicle has an adequate fuel level

☐ Ensure adequate hood clearance is available for manifold installation (if applicable)

☐ Ensure accessory drive compatibility with your intake manifold (if applicable)

☐ Ensure your exhaust system is free of leaks

5.0 Installation

5.1 Throttle Body Installation

The throttle body features two connectors: one for controlling the Throttle Position Sensor (TPS) and another that manages the fuel injectors, Idle Air Control (IAC), and the TMAP sensor.

NOTE:If you are installing a new distributor, such as the Aces Fuel Injection Black Jack Pro Distributor, you may find it easier to complete its installation before securing the throttle body. This can provide additional space to work.

Throttle Body Aerial View

Throttle Body Side View

1) Begin by removing the carburetor or other aftermarket EFI system. As you do so, take note of the vacuum lines and whether they are connected to ported or manifold vacuum. The method for identifying ported versus manifold vacuum varies by carburetor model, so refer to the manufacturer's specifications for your specific carburetor.

   

NOTE:If the carburetor will be removed for a length of time, be sure to plug your manifold with an appropriate material so that no foreign debris is allowed to enter the engine.

2) Install your new Deuces Wild 2 throttle body using the provided gasket and fasten using the screws or studs that were used for your carburetor.

 

3) Reconnect all vacuum hoses, ensuring that any ported vacuum systems are connected to the correct 3/16" port as shown in the instructions. Cap any unused ports with the provided rubber caps.

4) Once the installation is complete, install an air filter onto the throttle body. Air filters are available for purchase separately at acesefi.com .

6.0 Fuel System 

6.1 Fuel System Installation Steps

If you purchase a standalone EFI system, Fuel System components, such as fuel lines, fuel filters, and fuel pumps, will not be included.

1. Refer to the provided diagram for the correct orientation and location of fuel system components.

2. If using an electric in-line fuel pump, mount it as close to the fuel tank outlet as possible using the provided bracket that comes with the fuel system. This placement ensures that the pump primes efficiently, allowing for quicker starts.

3. Install the pre-filter between the fuel tank and the pump inlet. Confirm that the arrow on the filter points toward the pump.

4. Install the post filter between the pump outlet and the fuel rails. Confirm correct flow direction. Check hoses for any sharp bends or kinks.

⚠️ WARNING:Flush all fuel lines before connecting or assembling the fuel system. Failure to do so may push debris into the injectors, causing them to become clogged.

⚠️ WARNING: Verify correct filter orientation. Incorrect installation will cause a malfunction.

⚠️ WARNING:Some late-model vehicles originally equipped with a throttle body injection system may already have a fuel return line to the tank that can be utilized. However, the return line must not create a pressure restriction. The fuel pressure in the return line should not exceed 3-5 PSI. Using a line that is too small or has restrictions may cause tuning issues.

⚠️ WARNING:Do not use vapor canister lines as a fuel return line. This can lead to fuel leaks, fire, or explosion, potentially resulting in serious injury or death.

⚠️ WARNING: Proper installation of a fuel return line, if required, may necessitate the complete removal of the fuel tank. This task should only be performed by a fuel tank specialist familiar with the safety regulations and precautions necessary for this type of work. If an unqualified person attempts this procedure, an explosion could occur, causing serious injury or death.

7.0 Sensor Installation

⚠️ WARNING:Failure to disconnect the air smog pump or improperly positioning the oxygen sensor downstream from air injection will result in an extremely rich fuel mixture. This can cause drivability issues and severe engine damage. If you choose to disconnect the air smog pump, check local regulations to ensure compliance with emissions laws in your area.

7.1 Oxygen Sensor Installation Steps

1. For long-tube headers, place the sensor approximately 6 to 10 inches (150 to 250 mm) after the collector. Position the sensor as close to the engine as practical while keeping it upstream of any catalytic converter so the ECU receives an accurate and timely AFR signal.

2. Maintain enough exhaust pipe length after the sensor location to support a stable reading. A minimum of 18 inches (450 mm) of pipe downstream of the sensor is required, and 24 inches is preferred where space allows.

3. If the vehicle is equipped with an AIR or smog-pump system, the sensor must be installed where it reads untreated exhaust gas before any injected air enters the exhaust stream.

4. Mount the sensor in the upper half of the exhaust tube with the sensor body angled more than 10 degrees above horizontal. This helps reduce condensation exposure at the sensing element.

5. Before fixing the bung in place, verify that the connector and wiring will clear nearby components. Do not place the sensor where the harness may contact hot exhaust parts, moving components, or sharp edges.

6. Drill a 7/8" hole at the selected location. Then, either:

a. Weld the included sensor bung into the hole, ensuring a full weld around the bung for a leak-proof connection.

b. Alternatively, a clamp-on bung may be utilized. Clamp-on bungs are available for purchase at acesefi.com .

Allow the weld to cool completely before proceeding. Once cool, install the oxygen sensor into the bung and tighten securely. Apply anti-seize to the sensor threads to aid in future removal, but avoid contact with the sensor tip.

NOTE: Never run the engine with the oxygen sensor installed if it is not plugged in and powered by the ECU, as this can damage the sensor. If you need to temporarily plug the hole, use an O2 sensor plug or a spark plug with an 18mm thread.

7.2 O2 Sensor Electrical connection

Install one sensor in the driver-side bank and connect it to the matching harness connector. Install the second sensor in the passenger-side bank and connect it to the remaining wideband connector. Always confirm the correct connector by the printed harness label before powering the system.

Warning

● Leaded fuel will shorten the wideband oxygen sensor life and is not recommended.

● Use only oxygen-sensor-safe sealants in nearby exhaust work. Some silicone-based products can release compounds that may damage the sensor.

● Eliminate any exhaust leaks upstream of the sensor location before attempting to verify AFR or tune the system, since leaks ahead of the sensor can distort the reading.

● For turbocharged applications, place the sensor 12 to 24 inches downstream of the turbine outlet. Do not install the sensor ahead of the turbocharger.

7.3 Coolant Temperature Sensor Installation

Install the coolant temperature sensor into a 3/8" NPT coolant passage located in either the intake manifold or cylinder head. Be careful not to overtighten, as this could damage the cylinder head or intake.

Before installation, it is recommended to drain some coolant to prevent spillage. Apply thread sealer or a small amount of thread tape to the sensor threads to ensure a proper seal. 

IMPORTANT: Do not install the sensor in the thermostat housing or any location that does not experience a constant flow of coolant, as this will lead to inaccurate temperature readings.

8.0 Boost Reference Port

If you are not using a Roots-style supercharger, you may skip this step.

1. Turn the throttle body upside down. Apply a small drop of Loctite to the plug and install it into the threaded orifice located next to the throttle blades.

2. Identify the boost reference port on the throttle body. This port is positioned at the lower right corner, on the same side as the throttle cable linkage. Remove the existing plug.

3. Install a 1/16" pipe-to-hose fitting into the boost reference port.

The boost reference port on the throttle body should be connected below the supercharger, directly off the manifold. Alternatively, it can be split off from the boost gauge reference line if necessary.

9.0 ECU Installation

The ECU may be mounted inside the passenger compartment or in the engine compartment. If mounting in the engine compartment, follow these guidelines:

● Mount the ECU where water or road debris will not strike it directly. Do not mount where the ECU can be pressure-washed or submerged.

● Keep the ECU away from major heat sources. Do not place it near exhaust manifolds or headers.

● Keep the ECU as far as reasonably possible from sources of electrical noise, such as spark plug wires, capacitive discharge ignition boxes, and similar devices.

● Orient the ECU with the connector end pointing down so water cannot enter the terminals. If the harness route prevents this, include a drip loop in the wiring below the connector.

● Do not overtighten the mounting hardware, especially if the ECU is not on a perfectly flat surface.

● Use vibration isolation when possible. Your kit includes four rubber feet. Install the ECU with these rubber feet or equivalent isolation pads.

● Mount to a rigid metal surface using four M5 screws and flat washers.

● Route the wiring harness away from sharp edges and moving parts. Use grommets where the harness passes through bulkheads.

9.1 ECU Wiring Guidelines

● The Deuces Wild 2 ECU contains multiple processing units that require a clean power and ground source. The wiring harness must be routed to avoid exposure to dirty power or ground sources.

● Keep sensor wiring separate from high-voltage or "noisy/dirty" components, especially:

○ Secondary ignition wiring (e.g., spark plug wires).

○ Ignition boxes and their associated wiring.

● Ensure that spark plug wires do not come into direct contact with EFI wiring.

● Never bundle or loom EFI sensor wiring together with high-voltage or "noisy/dirty" wiring in parallel. If crossing is necessary, wires should intersect at an angle rather than running alongside each other.

9.2 ECU Power and Grounding

● The main power and ground connections must be made directly to the positive and negative battery terminals-not to any other connection points.

● Ensure the engine has a proper ground to both the battery and chassis.

● All wire connections should be properly crimped and soldered, with quality heat shrink applied over the joints for protection.

● Avoid using T-taps or similar connectors-use proper crimp connectors, solder, and heat shrink for all connections.

9.3 Additional Wiring Precautions

● Do not use the electric fan outputs to power the fans directly. These outputs should only serve as a trigger source for a properly sized relay that matches the fan(s) being used.

● Never splice or share signal wires between different electronic control units (e.g., "piggyback" systems). This can cause erratic behavior and unreliable sensor readings.

10.0 Wiring Installation

10.1 Harness Routing

If the ECU is mounted inside the vehicle, the main harness must be routed through the firewall into the engine compartment. If no existing pass-through is available, use a 2-inch hole saw to create an opening in the desired location. Install a grommet sized for a 2-inch hole to properly seal this area. One 1-inch grommet is included with your system.

If the ECU is mounted in the engine compartment, the cable for the user interface (the handheld or Bluetooth module) must be routed to the CAN connector on the main harness, which is located near the ECU main connector and labeled "CAN". If you want to access the handheld module after startup, the small CAN connector will need to be routed through the firewall to a convenient location inside the vehicle.

Connect the PIA and PIB connectors of the main harness to the ECU.

10.2 Sensor Connection

Connect the following components to their dedicated sensors and connectors as shown in the wiring diagram:

● Bulkhead connector

● Coolant Temperature Sensor (CTS)

● Wideband O₂ Sensor (WBO2)

● CAN connector

● Throttle body connector (PIC)

The PIC throttle body connector integrates wiring for the injectors, TMAP, TPS, and IAC. Plug this PIC connector into the corresponding throttle body port.

If using Deuces Wild ignition control, connect the distributor coil connectors accordingly.

Throttle Body Connector (PIC)

10.3 Ignition Coil (With Timing Control)

The Deuces Wild 2 ECU features a built-in ignition coil driver utilizing a high-performance IGBT chip. Aces recommends using the Blackjack Pro Series Ignition Coil (PN AC2008), which delivers 90mJ of spark energy with a 3ms dwell time without requiring a CDI box. This setup enhances cold starts, idle stability, and fuel economy.

If the harness and ECU are configured for timing control, connect the coil connector to the AC2008 ignition coil. If not, proceed as outlined later, in section 7.7.

NOTE:Canister-style coils are not recommended as some will not work with timing control.

Ignition Coil Connector

10.4 Loose Wires

The following loose wires in the main wiring harness must be connected as specified for all systems:

IGNSW (Red): Connect to a clean key-on/cranking +12V power source that is active when the ignition is on. Verify with a voltmeter that this source also provides power when the engine is cranking, as some sources do not.

● Located approximately 20" from the ECU connectors.

● DO NOT connect to a "dirty" source like an ignition coil.

12V Battery + (Red): Must be connected directly to the positive battery terminal. This wire supplies power to the fuel pump and injectors and is protected by a 20A fuse in a sealed fuse holder.

● The fuse holder is located about 8" from the ECU connector, with the fuse pre-installed.

Ground (Black): Must be connected directly to the negative battery terminal.

● Using a chassis ground is not recommended as it can cause electrical issues.

● Located approximately 20" from the ECU connectors.

FUEL_Pump (Orange): Provides +12V output to activate a fuel pump.

● Do not use this wire to power pumps that require more than 15A. Instead, use it to trigger a separate relay for high-current pumps and use a 10-gauge wire for the fuel pump's power feed.

● Ensure the fuel pump has a proper ground connection by running a wire from the negative fuel pump terminal to a solid chassis/frame ground.

10.5 Additional Wires

The following additional optional wire outputs should be connected as required. These wires are found approximately 23" from the ECU connectors unless otherwise specified.

Tach Out (Orange)This wire provides a 12V square-wave output and can be used to trigger a conventional tachometer.

Tach_In/Coil- (Grey)A tach output from an ignition box or other source like coil-. This is the tach input for the ECU when it is not controlling ignition timing.

Point Out (White)Points output is used for controlling timing when using an ignition box.

Fan1 (Purple)This output provides a ground output to trigger a relay used for a cooling fan. This output should never be directly connected to a fan but the relay that powers the fan. This wire is located approximately 32" from the ECU connectors.

Fan2 (Green)This output provides a ground output to trigger a relay used for a second cooling fan. This output should never be directly connected to a fan but the relay that powers the fan. This wire is located approximately 32" from the ECU connectors.

VMain (Red)This output will provide a 12V power supply from the main relay. This wire is located approximately 32" from the ECU connectors.

Nitrous_In (Purple)Nitrous oxide activation wire. Feeding 12V power to this wire tells the ECU that a nitrous oxide system has been activated.

AC_In (Orange)This is a 12V input that recognizes that the AC has been activated.

REV (Orange) Optional - Programmable ground output

10.6 PDM Installation

⚠️ WARNING: Do not run ignition coils off of the PDM. Doing so may damage the system.

Step 1: Mounting the PDM

● Mount the PDM securely using the mounting holes provided.

● Choose a location that is dry, protected, and easy to service.

● Keep the unit away from exhaust heat, water exposure, and moving components.

Step 2: Connect Main Battery Power and Ground

● Connect "VBAT: to the battery positive.

● Connect "GND" to battery negative or to a verified chassis ground of equal electrical quality.

Keep both the power feed and the ground path short, direct, and appropriately sized for expected current.

Step 3: Connect Ignition Key Input

Connect a true ignition-on source to "IGNKEY". This source should remain active during engine cranking. Do not use an accessory-only circuit that drops out during starting.

When IGNKEY is active, the PDM energizes:

● IGNSW1

● IGNSW2

● IGNSW3

These outputs provide clean switched power for supporting circuits.

Step 4: Connect ECU Main Power

● Use "VMAIN1", "VMAIN2", and/or "VMAIN3" for the ECU main power path as required by the system design.

● Use "MRD" as the main power control input for the VMAIN outputs.

● Follow the system wiring plan to determine which VMAIN outputs are used by the ECU and related circuits.

Step 5: Connect Fuel Pump Circuit

● Use "VPUMP" as the fuel pump power output.

● Use "RPUMP" as the fuel pump control input.

● Verify actual fuel pump current draw before final connection. The fuel pump circuit must remain within the 15 A maximum rating of VPUMP.

Step 6: Connect Fan Circuits

● Use "RLY1" and "RLY2" as control inputs for relay-fed fan stages or related switched circuits as required by the application.

● Use "VRLY1" and "VRLY2" as the corresponding relay-power outputs.

● Each of these outputs is limited to 10 A maximum, and both share fuse F1.

● If a fan motor or fan stage exceeds the available PDM channel capacity, use the PDM output to trigger an appropriately rated external relay rather than powering the fan motor directly from the PDM.

Step 7: Connect Auxiliary/AC Fan Circuit

● Use "RFAN" as the control input for the auxiliary fan circuit.

● Use "VFAN" as the corresponding fan power output.

● VFAN is limited to 10 A maximum.

Step 8: Connect Relay-Fed Accessories

Use "VRLY1" and "VRLY2" for controlled relay-fed accessories where needed. These outputs are suitable for devices such as auxiliary pumps, secondary fans, or other switched accessories when used within their rated limits.

Step 9: Connect Tachometer/POINT Circuit

Use "POINT" for tachometer signal routing. Treat the POINT circuit as a signal path only. It is not a load-power output.

10.7 Handheld or Bluetooth Module Connection

Connector Label: CAN

The CAN connection is used for communication devices such as the handheld controller or Bluetooth module. These devices allow initial system setup, access to live EFI data, and certain user adjustments or monitoring functions.

● Mount or route the connection so the device can be reached from the passenger compartment during installation, startup, and configuration.

● Plug the handheld or Bluetooth module into the designated CAN connector on the main harness. Verify the connector label before making the connection.

● Once the system has been configured and the engine is operating correctly, the handheld does not need to remain connected unless continued monitoring or tuning access is desired.

10.8 Ignition Wiring - No Timing Control

In a "no timing control" setup, the vehicle may be using an older mechanical points distributor or a more modern ignition system for carbureted engines. In this configuration, another component-such as the distributor or an ignition module-determines when the coil fires. The ECU needs to receive an RPM signal each time the coil fires to accurately determine engine speed.

● If a CD ignition box is used, the Killshot ECU will receive its RPM signal from the ignition box's "Tach Out" connection.

● If a traditional dwell-controlled inductive coil ignition system is used (without a CD ignition box), the Killshot ECU will get its RPM signal through the RPM Module, connecting to the negative side of the coil.

10.9 "Tach_In" Connection

Option 1: Direct Tach_In Connection

The "Tach_In" wire in the Deuces Wild 2 harness receives its RPM signal from another module, such as a CDI box, ignition coil, or another ignition module, and transmits it to the ECU.

NOTE: When using this input, the EFI will not control the ignition timing. Timing will be managed by the distributor's initial timing, mechanical advance, and vacuum advance, just as it would with a carburetor.

Option 2: Aftermarket Capacitive Discharge (CD) Ignition System

If using an aftermarket CD ignition system (such as Aces High Roller, or similar systems), the RPM signal must be connected from the "Tach Out" terminal of the ignition system to the "Tach_In" wire of the Killshot ECU. This provides a 12V square-wave signal to the ECU.

NOTE:When using this input, the EFI will not control the ignition timing. The distributor's initial timing, mechanical advance, and vacuum advance will determine ignition timing, just as with a carburetor setup.

11.0 Ignition Wiring for Timing Control

The Deuces Wild 2 EFI system can control ignition timing when used with most common magnetic pickup distributors, such as the Aces Blackjack series or MSD distributors. However, some modifications to the distributor are necessary to ensure proper function.

If you wish to use your Deuces Wild 2 system to control timing, your distributor must be locked out. Failure to do so can result in poor engine performance or even severe engine damage.

11.1 Required Components for Timing Control

● A locked-out distributor

● A timing light

● (Recommended) An Aces Black Jack Pro Series Billet Distributor with a 2-pin magnetic pickup connector

● A degreed harmonic balancer with a 15-degree BTDC (Before Top Dead Center) mark

11.2 Distributor Lockout and Installation Procedure

1. Lock out the distributor's centrifugal advance. The distributor must be physically locked to prevent any changes in the relationship between the pickup and paddle wheel due to engine speed or load. Follow the distributor manufacturer's instructions for the proper lockout procedure. Locking out the distributor is a necessary step and must not be skipped.

2. Rotate the engine to 15 degrees Before Top Dead Center (BTDC).

3. Insert the distributor into the engine, but do not tighten it down yet.

4. Rotate the distributor body so that the pickup aligns with the nearest paddle on the paddle wheel. Ensure the paddle is as centered as possible.

● Later in the installation, the Handheld Controller can be used to fine-tune this alignment if needed.

5. Secure the distributor by clamping it down.

6. Install the distributor cap and mark the center of the #1 terminal on the distributor body for reference.

11.3 Direct Drive Coil

The Deuces Wild 2 ECU features a built-in ignition coil driver utilizing a high-performance IGBT chip. Aces recommends using the Black Jack Pro Series Ignition Coil (SKU AC2008) to achieve:

● 90mJ of spark energy

● 3ms dwell time

● Improved cold starts, stable idling, and enhanced fuel economy

This setup eliminates the need for a CDI box while maintaining strong ignition performance.

The "Point" wire provides an ignition signal from the Deuces Wild ECU to an external module, such as the Aces High Roller CDI box.

12.0 Sensor Verification

IMPORTANT:If any of these sensors do not read properly, DO NOT attempt to start the engine.

Before starting the vehicle, verify that all sensors are reading correctly.

● Turn the key off, then cycle it back on.

● Listen for the fuel pump, which should activate and run for approximately 5 seconds.

● Inspect for any fuel leaks before proceeding.

12.1 Sensor Readings on the Home Screen (Key ON, Engine OFF)

● Engine RPM: Should display "0" (RPM will be detected once the engine is cranking or running).

● MAP (Manifold Air Pressure Sensor):Should read between 95-102 kPa or 13-14 PSI. At higher elevations, it may read as low as 75 kPa or 10-11.

● TPS (Throttle Position Sensor)

○ Slowly press the throttle to wide open; it should read 85-90 at wide-open throttle (WOT).

○ Cable-operated throttle bodies should read 0 when closed.

● CTS (Coolant Temperature Sensor):Displays engine temperature. If the engine is cold, it should be close to ambient temperature.

● Battery Voltage:Should read 12.0V minimum.

13.0 Startup Engine

At this point, you're ready to start the engine. Before attempting to start your vehicle with a newly installed Deuces Wild 2 EFI system, ACES recommends running through the following checklist to help ensure a safe and successful start:

☐ Double-check all wiring, especially:

☐ Power and Ground are run directly to the battery.

☐ The small Red "IGNSW" wire from the DEUCES WILD™ ECU has power during both Key-On and Cranking.

☐ The Deuces Wild 2 ECU, fuel pump, fuel lines, and wires are securely mounted away from heat sources and pinch points.

☐ Wide Band Oxygen Sensor is installed in a proper location.

☐ There are no exhaust leaks.

☐ Throttle linkage is complete and operational from the pedal.

☐ Handheld powers up during Key On.

☐ Each step of the Initial Setup in the Handheld has been done.

☐ At Key On the fuel pump primes.

☐ There are no fuel leaks when the system is under pressure.

☐ Wiring connection is for No Timing Control (unless using timing features, ACES recommends starting up your engine with no timing control at first start).

When ready to start the engine, watch for Engine RPM on the Handheld Dash to know that the Deuces Wild 2 ECU is getting proper input RPM signal.

Crank the engine and look at the RPM parameter. It should indicate RPM. The engine should fire and run and come to an idle. Cold engines will have high RPM, around 1200-1500, depending on engine temperature.

If you do not get an RPM signal, there is an error in the wiring or system setup. Call Aces Support at (423) 590-ACES for advice.

14.0 After Startup

Once the vehicle has started, look for any fuel or coolant leaks. Let the vehicle warm up while you check the following to make sure everything is operating properly:

☐ Fuel Loop State - Indicates whether the engine is "Closed Loop" or "Open Loop". Closed Loop indicates that the ECU is adding or subtracting fuel to maintain the target air/fuel ratio. The DEUCES WILD™ calibrations are such that the system should be operating closed loop almost all the time.

☐ Inj Percent - This is the percentage compensation of fuel that the ECU is adding or subtracting to maintain the target air/fuel ratio at any specific moment. A value less than 100% indicates the ECU is removing fuel. A value more than 100% indicates the ECU is adding fuel. When in open loop operation, this will always stay at 100%.

☐ Inj PW - Indicates the injector pulse width. This will vary depending on the engine speed and load.

☐ Target Air/Fuel Ratio - This is the target AFR (air/fuel ratio) the ECU is trying to maintain. This will vary depending on the engine speed and load.

☐ Actual AFR - This will show the air/fuel ratio that the wideband oxygen sensor is reading. The Closed Loop Compensation should be adding or subtracting fuel all the time such that the AFR value should always be close to the Target AFR.

☐ Fuel Learn State - This indicates the state of the DEUCES WILD™ "Self-Tuning" operation (Learn Status). The system will automatically tune itself as you drive around. There are several conditions that must be met for self-tuning to occur. The engine temperature must exceed 160° F, the system must be operating in a closed-loop mode, and self-tuning must be enabled. The base DEUCES WILD™ setup has self-tuning enabled. Once the engine reaches 160° F, self-tuning should be active.

15.0 Startup Wizard

The next step is to run the Startup Wizard, so the system can begin learning and building the fuel maps. The self-learning function performs best on stock to mild engine combinations, such as camshafts with a lobe separation angle of 110° or greater and engines producing approximately 200-375 horsepower. For more aggressive engine combinations, the self-learning feature alone may not provide optimal results, and manual tuning may be required.

15.1 Basic Navigation & Adjustment Methods

Before running your startup wizard, here are some basic interaction methods you should become familiar with to more easily make adjustments during the wizard process and afterwards.

Depending on your system, you will interact with and set up the Deuces Wild 2 EFI system using either an Aces handheld controller or a Bluetooth module with the Aces app. Whether you use a supported handheld or the app, they will all provide access to the same basic functions and menus.

Aces 5" HD Handheld (3rd gen) shown

The handheld is a color touchscreen device that connects to the harness via a CAN bus cable. Screen sizes may vary by kit, but operation is the same across all versions. The Bluetooth module allows you to perform the same functions using a compatible mobile device and the Aces EFI app.

After connecting to the ECU, the handheld or app allows you to monitor and adjust key system parameters, including:

● Idle speed settings

● AFR (air fuel ratio) targets

● Fuel pump settings

● Basic startup and drivability parameters

Real-time data such as engine speed, coolant temperature, throttle position, and lambda can be viewed on live data screens for monitoring and basic diagnostics.

Use the touchscreen or on-screen menus to move between the home screen, setup wizards, tuning menus, and live data views.

15.2 Making Adjustments

Below are the various methods for adjusting parameters or setting data points. We will use the example of adjusting your Fuel Prime Percent to demonstrate how to use each of these methods.

1. Slider Bars
By default, for most settings, a slider bar will be shown. Slide the circle on the bar left or right, or click the "-" or "+" buttons on the touchscreen to adjust the parameters. Click the save icon in the top left corner to save the adjustment or click the return button in the top right corner to cancel saving.

2) Numeric Keypads
To display a numeric keypad and enter a more specific data point, click the edit box (the area where the number "100.0%" is being displayed above the sliding bar) to display a keypad. Once you enter the desired data point here, you can click "OK" to save or "Cancel" to cancel saving.

3) 2D Graphs
Drag the red dot on the graph or click the mechanical buttons on both sides to adjust the parameters. The y-axis coordinate value of the currently adjusted parameter will be displayed in the upper right corner. The four buttons on both sides of the interface will disappear after a short delay. Clicking the two mechanical buttons at the lower left corner can switch the position of the green dot, clicking the button at the right center can raise the position of the green dot, and clicking the mechanical button at the lower right corner can lower the position of the yellow dot. The y-axis coordinate value of the green dot is displayed in the upper-right corner of the interface.

15.3 Connection

The handheld is connected to the ECU through the CAN bus. Program upgrading can be done through the type-C USB interface.

15.4 Navigation Buttons

The ACES Handheld is designed for reliable operation and use. There are buttons on both sides of the display. The handheld is operated by touching the screen or the buttons on the sides. (See figure on the next page.)

15.5 Main Menu

The Main Menu has six selections: Monitor, Tuning, Logging, Files, Settings, and Wizards.

● Monitor - A variety of gauge and dash displays.

● Tuning - Allows for various parameters to be easily adjusted.

● Logging - Users can freely choose the monitored object to write to the log file in order to better observe the ECU data.

● Files - Saves and loads tuning calibrations. Also shows information about the ECU and handheld controller.

● Settings - Adjust the backlight brightness and volume for sound of buttons or touchscreen and see information about the handheld.

● Wizards - Creates a base calibration and performs the TPS Zero Learn function.

The Deuces Wild 2 system will build a custom calibration for your engine based on a few easy to answer questions. To begin, Choose the Wizards icon from the main menu.

16.0 Calibration Wizard

17.0 Timing Verification

17.1 No Timing Control

With a timing light, verify that the timing is set to an appropriate value for your engine. Adjust as necessary. It is critical to have the timing set correctly before driving the vehicle. Many drivability and idle issues can be avoided with a properly timed engine.

17.2 Timing Control

Have a timing light handy as the first step will be positioning the distributor.

● Switch the ignition key ON to power the system up and go to Handheld Tuning >>Spark>>Basic >> Static Timing. This screen allows you to set the distributor exactly where the DEUCES WILD™ ECU needs it to be positioned to operate the timing.

● Start the engine. Set the static timing to 15 degrees BTDC.

● Go to Handheld Tuning>>Spark>>Advanced>>Lock Ignition Timing. Click Enter to select Lock. Then save. Ignition timing is now locked at 15 degrees BTDC.

● Using the timing light, rotate the distributor until you see 15 degrees BTDC on the balancer. Tighten the hold down clamp.

● Set Lock Ignition Timing to "unlock." Set static timing to 15 degrees BTDC. Go back to the Home Screen. The system will now be controlling the ignition timing. It is important to note that you will not see accurate timing at idle speed when viewing with a timing light. This is due to ECU calculations. If you rev the engine off idle, the timing will appear correctly.

● Go to the Spark screen, Tuning >>Spark>>Basic. Here, you can adjust the idle, cruise, WOT, and cranking timing settings. It is HIGHLY recommended that you build a timing map using Aces' PC software, available at Acesefi.com. The timing map built using the Handheld is very basic, and your engine will perform much more optimally with a timing curve built specifically for it.

17.3 Timing Offset

Use this value to sync timing at higher RPMs. These values are set to 0 in the base calibrations. Some ignition modules may need this number altered if the commanded timing does not match the commanded timing as engine speed increases. If the timing starts to retard as rpm increases, this number can be increased for the timing to match.

18.0 Idle Setting

Once the engine is warmed up, the idle speed can be set.

● Select the Tuning tab.

● Find the "Hot Idle Speed" screen.

● Move the button left and right to adjust. Click the button to save the new value or select CANCEL at the bottom to move out of this screen.

Whether you change the target idle or not, you need to set the throttle plates on the throttle body to an optimal position.

● With the engine running, select the Monitor tab. You will see the Idle screen.

● Look at the "IAC Position" value. This value should be between 6 and 20 with the engine in neutral and up to operating temperature. Also make sure the "TPS" shows 0. If it is not, you need to perform a TPS Zero Learn.

● If the "IAC Position" value is zero, you must close the throttle plates until it reads a value of 6-20. Slowly turn the throttle plate adjustment screw counterclockwise on the throttle body.

● If the IAC position is "stuck" at zero, it is likely that the engine is idling at a higher speed than you have set for the target idle speed. You need to adjust the throttle plates to resolve this issue.

● If the "IAC Position" value is greater than 20, it is a good idea to open the throttle plates until the "IAC Position" value is between 6 and 20. Do this by turning the throttle plate adjustment screw clockwise. Note that if you open the throttle plates such that the "TPS" position goes above zero, you will need to shut the vehicle off and perform a TPS Zero Learn. Then, restart the vehicle and continue adjusting the throttle plates.

● Once the TPS goes above zero, the ECU goes out of its "idle" mode and will lock the IAC position to a fixed value.

When the adjustments are completed, make sure the TPS reads 0 with the engine idling.

19.0 Self-Learning

The Deuces Wild 2 ECU is equipped with a Self-Learning system that can build a tuning profile as you drive. In order to use Self-Learning to its full effect, it is important to drive the vehicle under various speeds and loads.

Begin by slowly revving the engine in neutral and holding it at different speeds up to 2500 RPM. Then drive the vehicle as normal using different transmission gears to learn in different areas. If you have an automatic transmission, you may want to put it in gear, and with your foot on the brake pedal, and apply a SMALL amount of throttle so that the system learns in this area as well.

NOTE: There are several conditions where Learning will NOT occur. They are the following:

● If the engine is below 160° F

● When the engine detects quick accelerator pedal movement

● When the accelerator pedal is released, and the vehicle is coasting

● If learning is disabled by the user

If you would like to see if self-tuning is completed in a certain area, follow these instructions in your Handheld:

● Select Monitor from the Main Menu.

● Select the "Fuel Inj PW" icon. The Fuel Learn Status indicates if the learn feature is active.

You are now ready to drive and enjoy your Deuces Wild 2 EFI system.

20.0 Diagnostic LEDs