I have no idea how to tune my IAC

turbo3.4 · Post by **turbo3.4** » Sun Feb 12, 2006 11:40 am

Ok, right now my idle is around 2700rpm. i'm trying to tune my IAC but can't seem to figure out how to get the rpms to drop. when i cover the iac hole the rpms drop to normal. so i need the iac to be almost closes. what should i be adjusting here? also whats the best way to test to see if i wired up my iac correctly?

Keithg · Post by **Keithg** » Sun Feb 12, 2006 1:16 pm

more info needed to help. Vehicle, engine, IAC type (Bosch, ford, 2 or 3 pin, how it is wired, which version of MSnS-E or MS-II, etc... If it is a stepper motor, it will not work with MSnS-E.

turbo3.4 · Post by **turbo3.4** » Sun Feb 12, 2006 1:34 pm

'95 camaro, 3.4L, turbo'd, GM 4 wire IAC, I have it wired as following:

Blu/Wht - 25 pin
Blu/Blk - 27
Grn/Wht - 29
Grn/Blk - 31

I'm running MSII, V3, 2.3 code.

mops · Post by **mops** » Sun Feb 19, 2006 11:21 am

is it idle stepper motor or PWM IAC ?
4 wires GM sound like stepper motor to me. check out the docs. they are very precise about setting these thing up.