idle adjustment 575 sci
#2
Platinum Member
Platinum Member
iTrader: (6)
it should be controlled by the PCM
#4
Registered
Mine idled high after coming off plane and stumbled going into gear. I cleaned the IAC's and it was better....for a while. I'll replace them next summer. Anybody have a GM part number?
#6
Registered
The ecm has a desired idle speed. If you adjust the throttle blades, the ecm will counter with timing changes and/or IAC position. It will do it's best to hit the desired idle rpm, even if that means adding 15* of timing and opening the IAC all the way. Are you having an issue in neutral or going into or out of gear?
Eddie
Eddie
#10
Registered
Thread Starter
It also sounds a little tiny bit loaded up at low idle.