@ RACIN ; Idle Setting Procedure Please Note: These steps MUST be performed in sequencell 4a. Get engine to operating temperature. Disconnect IAC (Idle Air Control) Solenoid. If engine stalls, turn throttle-stop screw in one full tum and restart. Repeat as necessary until engine will idle with IAC unplugged. Set idle using throttle stop. Idle speed will vary depending upon modications made to the engine. Set to Where you are comfortable with idle speed. Set TPS (Throttle Position Sensor) anywhere om .96 to .98 volts. This is done by loosening the mounting screws, and lightly rotating TPS. If you cannot obtain the desired range, you may need to make the mounting holes slightly larger. This can be done by drilling them. T PS wire colors to be probed are generally the BLACK and GREEN wire, or the GRA Y/RED and GRA Y/WHI TE, depending on your vehicle. Stop engine. Disconnect negative terminal battery cable for 1520 minutes. You may wish to tap the brakes or turn the headlights on and off a few times as this will help to ensure that you have purged any remaining electrical current from the vehicle. This will reset the computer to factory defaults. Reconnect IAC Solenoid. Reconnect battery cable to negative terminal. Restart engine. If problem persists, inspect for mass air meter problems and possible vacuum leaks. J HD/F ord Racing