IAC Relearn

IAC Relearn Procedure

If you are having idle issue you may need to reset your Idle Air Control (IAC) and

TPS, do this before you start drilling holes in your throttle body (TB) blade. I have

used this procedure on some huge cammed cars and it worked.

1) Monitor your IAC, Idle Speed, throttle position voltage and your throttle position %.

2) With the key in the ON position, adjust your TB set screw until your throttle position

is 2%.

3) Turn your key to the OFF position.

4) Unplug your Throttle Position Sensor (TPS) and IAC.

5) Turn your key to the ON position for a few seconds, and then OFF again.

6) Plug in the TPS and IAC and then turn your key to the ON position and restart

logging. Your throttle position will now be reset to 0 degrees and about .45-.55 volts.

7) Start your engine, your IAC should be 40-60 for a cammed engine.

if you are not at your desired IAC position redo the above procedures in smaller

increments.