Ford > Engine > Idle

General

• Idle Control Enable RPM Error: If the difference between actual RPM and Desired Idle RPM is less than this the ECM will use adaptive methods to control the idle.
• Idle Control Disable RPM Error: If the difference between actual RPM and Desired Idle RPM is less than this the ECM will disable adaptive idle control.
• Idle Minimum VSS: Below this vehicle speed the ECM will use adaptive methods to control the idle(closed loop idle). Above this speed the idle uses the dashpot feature.
• Idle In Gear to P/N Delay: The delay to transition from in Gear to Park/Neutral state.

• Idle P/N to In Gear Delay vs. Temp: The delay to transition from Park/Neutral to In Gear(not reverse) state in relation to a interpolation of ECT and Trans Oil Temp.
• Idle P/N to Reverse Delay vs. Temp: The delay to transition from Park/Neutral to Reverse state in relation to a interpolation of ECT and Trans Oil Temp.

• Idle AC Delay Initial vs. RPM: This is the delay after commanding the AC clutch on before the AC compressor begins to apply load on the engine.
• Idle AC Delay Cycling vs. RPM: This is the delay after commanding the AC clutch on before the AC compressor begins to apply load on the engine.

Idle RPM

• Idle RPM - In Gear: The desired idle speed with the transmission In Gear.
• Idle RPM - Park/Neutral: The desired idle speed in Park or Neutral.

• Idle RPM Adder - Startup: This value adds to the Desired Idle RPM at startup until Max Time has expired or the throttle is opened.
• Idle RPM Adder - Startup Max Time: This is the time that the startup idle adder will be used.
• Idle RPM Adder(AC on, Drive): This value adds to the Idle RPM when the AC is switched on in Drive.
• Idle RPM Adder(AC on, P/N): This value adds to the Idle RPM when the AC is switched on in Park/Neutral.

• Idle RPM Max(Drive) vs. ECT: This table limits the maximum allowed idle speed when in drive.
• Idle RPM Adder vs. ECT: These values add to the Desired Idle RPM in relation to ECT.
• Idle RPM Adder vs. IAT: These values add to the Desired Idle RPM in relation to IAT.
• Idle RPM Adder vs. Startup ECT: These values add to the Desired Idle RPM in relation to Startup ECT during the initial engine startup.
• Idle RPM Adder vs. Startup IAT: These values add to the Desired Idle RPM in relation to Startup IAT during the initial engine startup.

• Fan High Speed Idle: This enabled/disables Idle RPM modification when the high speed cooling fan engages.

Idle Airflow

• Idle Airflow(Drive) vs. Desired Idle RPM: This is the base airflow value used to command the ISC valve open for a given Desired Idle RPM, when in Park/Neutral.
• Idle Airflow Mult(Drive) vs. ECT vs. ERT: This is the idle airflow multiplier in relation to ECT and engine run time(ERT), when in Drive.
• Idle Airflow Mult(Drive) Alcohol vs. ECT vs. ERT: This is the idle airflow multiplier in relation to ECT and engine run time(ERT), when in Drive. Alcohol applications only.
• Idle Airflow(P/N) vs. Desired Idle RPM: This is the base airflow value used to command the ISC valve open for a given Desired Idle RPM, when in Park/Neutral.
• Idle Airflow Mult(P/N) vs. ECT vs. ERT: This is the idle airflow multiplier in relation to ECT and engine run time(ERT), when in Park/Neutral.
• Idle Airflow Mult(P/N) Alcohol vs. ECT vs. ERT: This is the idle airflow multiplier in relation to ECT and engine run time(ERT), when in Park/Neutral. Alcohol applications only.
• Idle Airflow Integrator Time Underspeed: The time rate at which the integrator will adjust the idle airflow to correct the idle RPM, lower numbers are faster.
• Idle Airflow Integrator Time Overspeed: The time rate at which the integrator will adjust the idle airflow to correct the idle RPM, lower numbers are faster.

PCV Airflow

• Idle PCV Airflow vs. Load: This is the PCV airflow that is not measured by the MAF in releation to Load.

Fans Airflow

• Idle Airflow - Fan Low: This value adds to the base idle airflow if the low speed fan is engaged.
• Idle Airflow Delay - Fan Low: This is the delay before adding the fan idle airflow value.

Dashpot

• Idle Dashpot Decay vs. Dashpot Airflow: Time delay before decaying DFCO airflow.
• Idle Dashpot Minimum vs. Desired Idle RPM: When DFCO is entered airflow is ramped to the target Entry DFCO value at this rate.
• Idle Dashpot Preposition vs. RPM: When DFCO is exited airflow is ramped to the target DFCO Exit value at this rate.
• Idle Dashpot Minimum(4th,No Decel) vs. Desired Idle RPM: This is the minimum airflow allowed when the vehicle is moving in 4th gear and very little deceleration has been detected in relation to Desired Idle RPM.
• Idle Dashpot Minimum(the Gear) vs. Desired Idle RPM: This is the minimum airflow allowed when the vehicle is moving in 4th gear in relation to Desired Idle RPM.