Enables learned or adaptive correction of cranking fuel. Turn it on when the strategy is supported and you want repeated starts to refine fueling; leave it off while establishing a known, fixed cranking calibration.
Controls how quickly after-start enrichment is removed. Higher values generally make the enrichment decay faster, while lower values keep extra fuel longer; change it when cold or hot restarts are briefly too rich or too lean.
Defines the coolant-temperature breakpoints for after-start enrichment. Change them only to create different correction regions for cold, warm, and hot starts, and keep the values in ascending order.
Sets the reference fuel pressure used to calculate injector delivery. Enter the actual pressure differential at which the injector flow rating is specified; an incorrect value will make the entire fuel calculation inaccurate.
Sets the time step used to fade after-start fuel enrichment after the engine begins running. Increase it to make the extra fuel remain longer, or decrease it to remove the enrichment sooner.
Controls how quickly after-start enrichment is removed. Higher values generally make the enrichment decay faster, while lower values keep extra fuel longer; change it when cold or hot restarts are briefly too rich or too lean.
Enables deceleration fuel cut, which stops or reduces injection during closed-throttle overrun. Turn it on to reduce fuel use and exhaust heat during decel; turn it off if it causes stalling, harsh re-entry, or drivability issues while the thresholds are being tuned.
Sets a global fuel offset percentage applied by the fuel strategy. Increase it to add fuel broadly or decrease it to remove fuel; use it only for temporary overall correction, then fix injector, pressure, or VE settings if the offset is consistently needed.
Catalyst Protection Enrich Gain
Sets the additional fuel used by the catalyst/exhaust-temperature protection strategy. Increase it only when more enrichment is required under sustained high load; decrease it cautiously because insufficient enrichment can raise exhaust temperature.
Defines the engine coolant temperature breakpoints used by this table (°C). Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
Sets the commanded air/fuel ratio used during steady cruise when the single-value cruise target is active. A higher AFR number is leaner and a lower number is richer; change it only after confirming stable closed-loop operation and safe combustion.
Sets the commanded air/fuel ratio at idle when the single-value idle target is active. A higher number is leaner and a lower number is richer; adjust it for idle quality, emissions, and fuel stability while watching misfire and exhaust temperature.
Adds or removes fuel based on coolant temperature. Increase cold-temperature values when the engine is lean during warm-up; decrease them when cold operation is overly rich, and taper the correction toward zero at normal temperature.
Applies a temperature-based offset to the commanded AFR. Use it to temporarily command richer or leaner mixtures as the engine warms; verify the sign convention before changing values.
Enables long-term fuel learning from closed-loop oxygen-sensor feedback. Turn it on after the base fuel and target-AFR tables are reasonably close; turn it off during diagnosis or when you need the calibration to remain unchanged.
Sets the minimum coolant temperature required before fuel learning begins. Raise it to prevent learning during warm-up, or lower it only when the engine and oxygen sensor are stable enough to learn accurately at cooler temperatures.
Sets the maximum negative fuel correction that long-term learning may store or apply. Make it more negative only when the base tune legitimately needs fuel removed; keep it conservative so learning cannot hide a sensor or fuel-system problem.
Defines the manifold pressure/load breakpoints used by this table (kPa). Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
Sets how aggressively long-term fuel learning changes the stored correction. Increase it for faster learning, or decrease it for smoother, more conservative updates when the learned table is unstable.
Sets how often the ECU updates long-term fuel learning. A shorter cycle learns more quickly but may react to transient noise; a longer cycle learns more slowly and smoothly.
Sets the maximum positive fuel correction that long-term learning may store or apply. Raise it only when the base tune is known to need more correction; lower it to prevent large learned enrichment from hiding a calibration or hardware problem.
Enables closed-loop fuel correction using wideband oxygen-sensor feedback. Turn it on for normal self-correction after the sensor and target AFR are verified; turn it off for open-loop testing or sensor troubleshooting.
Sets the minimum coolant temperature required before closed-loop fuel correction begins. Raise it to keep warm-up fueling open loop longer, or lower it only if the wideband is active and stable sooner.
Sets the maximum negative short-term closed-loop fuel correction. Allow more negative correction only when necessary; keep the limit conservative so closed loop cannot remove excessive fuel because of a bad sensor or base calibration.
Sets the maximum positive short-term closed-loop fuel correction. Increase it only if additional enrichment authority is needed; reduce it to prevent closed loop from masking a base-fuel or hardware problem.
Defines the manifold-pressure/load breakpoints for the target-AFR table. Change them only to redistribute table resolution across vacuum and boost/load areas, keeping the values in ascending order.
Controls how strongly the stored fuel-learn correction is applied. Increase it to use more of the learned correction or decrease it to soften its effect; change it only when validating the learning strategy.
Defines the engine speed breakpoints used by this table (RPM). Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
Defines the engine-speed breakpoints for the target-AFR table. Change them to place more tuning resolution in important RPM ranges, keeping the values in ascending order.
Defines the pressure values paired with the fuel-pressure sensor voltage table. Enter the installed sensor's datasheet values and verify the reading with a mechanical gauge; do not use this table to correct an actual fuel-pressure problem.
Defines the voltage breakpoints for the fuel-pressure sensor calibration (volts). Change them only to match the installed sensor's voltage-to-pressure data, keeping each voltage paired with the correct pressure value.
Defines the battery-voltage breakpoints used for voltage compensation. Change them only if the table needs to cover a different electrical-system range, keeping the points in ascending order.
Sets the throttle-position threshold that activates clear-flood mode during cranking, typically reducing or disabling injector fuel. Change it only if the installed throttle calibration prevents the mode from engaging correctly; set it high enough to avoid accidental activation.
Sets the amount of priming fuel delivered when the system is powered on before cranking. Increase it if the engine needs more fuel for the first start attempt; decrease it if it floods or produces a strong fuel smell before cranking.
Defines injector dead time/offset across battery voltage. Enter data for the installed injectors and fuel pressure; incorrect values cause fueling errors that are most noticeable at idle and low pulse widths.
Enables injector-flow compensation using measured fuel pressure. Turn it on only when a correctly calibrated fuel-pressure sensor is installed and the pressure reference is configured; otherwise leave it off.
Defines injector pulse width during cranking across coolant temperature and engine speed. Increase cells when the engine cranks without enough fuel; decrease them when plugs foul, fuel odor is strong, or hot starts are overly rich.
Sets the extra fuel applied immediately after the engine starts, based on temperature and RPM. Increase cells when the engine starts but then goes lean or stalls; decrease them when it loads up, smokes, or runs overly rich after starting.
Defines the engine coolant temperature breakpoints used by this table (°C). Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
Defines the engine speed breakpoints used by this table (RPM). Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
Defines the coolant-temperature breakpoints for acceleration enrichment. Change the temperature breakpoints only when you need different cold-versus-hot tuning regions, and keep them in ascending order.
Acceleration Correction vs TPS
Sets how much transient fuel is added for a given throttle-position change.
Increase the values if the engine goes lean or hesitates during a quick throttle opening; decrease them if it becomes excessively rich.
Acceleration TPS Position
Defines the throttle-position breakpoints used by acceleration enrichment. Change them to concentrate tuning resolution in the throttle range where tip-in hesitation occurs, keeping the points in ascending order.
Displays or stores the learned fuel correction by operating cell. Positive values add fuel and negative values remove fuel; review the pattern to improve the base fuel table, and edit or clear cells only when correcting known bad learning.
