I reset my IAC according to the procedure from GNTTYPE.org and then I got my car up to operating temperature so I could try and adjust the IAC because my idle is too high. I then realized that with the 6.0 TT chip that the engine control at idle is open loop and the adjustment procedure from gnttype.org calls for the engine control to be closed loop. Well, I have open loop idle, so is this procedure still valid as long as the engine is at operating temperature?
- Warm the engine to normal operating temperature. This is important ... the car needs to be in closed loop.
- Connect scan tool. Verify it's in closed loop.
- Put the car in park and wait a couple seconds for it to settle into a regular idle.