Ford > Fuel System

Fuel Pump

• Fuel Pump Fixed Duty Cycle Mode: Master enable/disable for Fuel Pump fixed duty cycle mode.
• Fuel Pump Fixed Duty Cycle: The duty cycle used when in fixed duty cycle mode.
• Fuel Pump Desired Injector Pressure Drop vs. Mass: This is the desired fuel pressure for mass flow.
• Fuel Pump Desired Injector Pressure Drop High Load vs. Mass: This is the desired fuel pressure for mass flow at high load.
• Fuel Pump Injector Pressure Drop Adder vs. Ambient Temp: This adds to the injector pressure drop in relation to ambient air temperature.
• Fuel Pump Voltage vs. Flow vs. Pressure: The commanded pump voltage in relation to flow and desired pressure.
• Fuel Pump Adaptive Voltage: Master enable/disable for Fuel Pump adaptive voltage function.
• Fuel Pump Gain - Derivative: The derivative gain on the fuel pump control terms.
• Fuel Pump Gain - Integral: The Integral gain on the fuel pump control terms.
• Fuel Pump Gain - Proportional: The Proportional gain on the fuel pump control terms.
• Fuel Pump Gain Voltage Deadband: Fuel pump voltage will not be corrected if desired change is less than this.
• Fuel Pump Low Limit Mult: Sets a lower limit for the fuel pump voltage, multiply by the base voltage lookup.
• Fuel Pump High Limit Mult: Sets an upper limit for the fuel pump voltage, multiply by the base voltage lookup.
• Fuel Pump Update Time: The minimum time between updates.
• Fuel Pump Time Constant: The rate at which the pump voltage will adapt when required, lower numbers are faster.
• Fuel Pump Pump Off Duty Cycle: Duty Cycle when pump is off.
• Fuel Pump Minimum On Time: The minimum amount of time the fuel pump can be activated.

Fuel Pressure Test

• Fuel Pressure Test Fail Time: The fuel pressure test failed for this length of time. P0190, P0191, P0192 or P0193 will be set.
• Fuel Pressure Test Fail Delta: If the fuel pressure changes more than this, the fail timer will begin.
• Fuel Pressure Test Error Buffer: The allowed error on the actual fuel pressure before the low pressure test will begin.
• Fuel Pressure Test Low: If the actual pressure minus the Error Buffer is lower than this value then the low pressure test will begin.
• Fuel Pressure Test Drop: If the pressure drop is lower than this value then the low pressure test will begin.

Ambient

• Ambient IAT Delta - Ambient Update: The difference between ambient and IAT to trigger an update.
• Ambient IAT Delta: The minimum offset of ambient from IAT.
• Ambient Update - ECT Min: Below this ECT, ambient temp update will be disabled.
• Ambient Update - VSS Min: Below this speed, ambient temp update will be disabled.
• Ambient High Pressure Switch Thresh: Above this temperature the fuel pump will switch to higher pressure and use the ambient temp adder table.
• Ambient Inferred Time Constant: Time constant for calculating ambient temperature changes.
• Ambient Adder(AC On): Ambient temperature adder for when AC is on.
• Ambient IAT/ECT Factor During Soak: This factor is used to weight between ECT and IAT during soak periods. Numbers closer to 1.0 weight towards ECT and numbers closer to 0 weight to IAT.
• Ambient Rail Temp Time Constant vs. Fuel Flow: