Ford > Engine > Fuel Control> Open & Closed

Base Fuel

• Fuel Base vs. RPM vs. TPS: This is the base openloop fuel table in relation to RPM and TPS when the engine is at normal temperature. All values are in lambda.
• Fuel Base Cold vs. ECT vs. Load: This is the base openloop fuel table in relation to ECT and Load when the engine is cold. All values are in lambda.
• Fuel Base Enable ECT: Above this temperature the base fuel table will be used.
• Fuel Base Disable ECT: Below this temperature the base fuel cold table will be used.
• Fuel Base Enable Time: Minimum time before switching to base fuel table.
• Fuel Base Cold Enrich Decay vs. ECT vs. ERT: This table provides extra enrichment for a cold engine in relation to ECT and engine run time(ERT). These values are subtracted from the base lambda valu and should normally decay to zero.
• Fuel Cyl Off vs. RPM vs. Load: This is the commanded lambda value when cylinder fuel cutoff is enabled.

Cranking Fuel

• Fuel Cranking vs. ECT: This is the commanded lambda value when the engine is cranking.

Open/Closed Loop

• Closed Loop Delay vs. Startup ECT: This is the delay before closed loop fuel will be entered after the engine has been started in relation to Startup ECT.
• Closed Loop O2 Sensor Temp: Closed loop will not be entered until the calculated O2 Sensor temperature is above this.
• Open Loop Delay vs. RPM vs. Gear: This is the time delay before switching to openloop when Openloop fuel TPS thresholds are met.
• Open Loop Delay Ramp: If the Open Loop Delay is less than this value the blending ramp will by bypassed.
• Open Loop Delay Blending Ramp: This is the rate that fuel will ramp to the commanded open loop lambda.
• Open Loop Delay Maximum: This is the maximum value the openloop delay timer can achieve. If you set this below the Open Loop Delay value, openloop will never enable.
• Open/Closed Loop Hot Start ECT: When ECT is higher than this it is considered a Hot Start.
• Open/Closed Loop Cold Start ECT: When ECT is lower than this it is considered a Cold Start.
• Open Loop Decel Load vs. RPM: During closed throttle decel, if Load is below this threshold then openloop fuel will be enabled.
• Open Loop Fuel TPS Thresh vs. RPM: The throttle position(TPS) threshold required to enable open loop fuel in relation to RPM.
• Fuel Adaptive WOT Switch: At WOT if this switch is disabled, it disables Open Loop Adaptive state(if supported).

LTFT Fuel Trims

• LTFT Learning Switch: Master enable/disable for LTFT Learning system.
• LTFT Learning Min IAT: Below this temperature, LTFT Learning will be disabled.
• LTFT Learning Max IAT: Above this temperature, LTFT Learning will be disabled.
• LTFT Learning Max Limit: The maximum value of the LTFT Learning.
• LTFT Learning Min Limit: The minimum value of the LTFT Learning.
• LTFT Learning Min Load: Below this Load, LTFT Learning will be disabled.
• LTFT Learning Max TPS: Above this TPS(AD Counts), LTFT Learning will be disabled.
• LTFT Bank vs. Cylinder #: This specifies which bank each cylinder belongs to for fuel trim calculations.

O2 Sensor Closed Loop Bias

• O2 Closed Loop Bias Min: This is the minimum allowed closed loop bias voltage.
• O2 Closed Loop Bias A vs. RPM vs. Load: The closed loop bias voltage for the O2 sensors. Positive values are richer, negative values are leaner.
• O2 Closed Loop Bias Bank 1 vs. RPM vs. Load: The closed loop bias voltage for the Bank 1 O2 sensor. Positive values are richer, negative values are leaner.
• O2 Closed Loop Bias Bank 2 vs. RPM vs. Load: The closed loop bias voltage for the Bank 2 O2 sensor. Positive values are richer, negative values are leaner.

O2 Transport Delay Learn

• O2 Transport Delay Learn - Load Min: Below this Load, O2 Transport Delay learning will be disabled.
• O2 Transport Delay Learn - Load Max: Above this Load, O2 Transport Delay learning will be disabled.
• O2 Transport Delay Learn - RPM Min: Below this RPM, O2 Transport Delay learning will be disabled.
• O2 Transport Delay Learn - RPM Max: Above this RPM, O2 Transport Delay learning will be disabled.
• O2 Transport Delay Learn - Sec Min: This is the minimum allowed learned time offset for the O2 Transport Delay.
• O2 Transport Delay Learn - Sec Max: This is the maximum allowed learned time offset for the O2 Transport Delay.
• O2 Transport Delay Learn - Time Min: This is the minimum allowed learned total time for the O2 Transport Delay.
• O2 Transport Delay Learn - Time Max: This is the maximum allowed learned total time for the O2 Transport Delay.
• O2 Transport Delay Learn - ECT Min: Below this ECT, O2 Transport Delay learning will be disabled.
• O2 Transport Delay vs. RPM vs. Load: This is the base transport delay from when the injector begins injecting fuel to when the O2 sensor applies a correction to the fueling.