Possible IAC (Idle air control) Valve problem

[B2k4E]

Some of you might have seen my rear end help thread, but now I've run into a new problem... Every time I go into any gear that puts power to the ground (OD, D, 1, 2, R) the camaro seems to propel itself without me even touching the accelerator. Usually hovers around 10-15mph by itself and I have to intervene by using the brakes by which no doubt is wearing the brakes down and causing stress on the engine. The engine in my 86 camaro is a 350 TPI.

My father says it's the IAC valve but I'm wondering if anybody has had a problem like this?

If it is the IAC valve; where is it and how do you go about uninstalling then reinstalling it, and reseting it to the correct idle speed?

Also noticed that the tachometer runs about 2300 RPM when in park and 1300-1600 RPM when in drive pressing on the brakes. The tach might be off but I doubt it.

Any help/advice would be appreciated, so close to getting this thing drivable. Got a fan harness and relay to fix the fan issue and a new pinon seal for the rear end on the way. (After some inspection it looks like the original seal is done for)

[GRASSHOPPER]

look at your engine emisions sticker under the hood, i think your idle is way too high and that is why it moves so easily when in gear. it could be 1 of several sensors not working right, check your engine codes it might tell you which one is shot
good luck

[B2k4E]

Originally Posted by GRASSHOPPER

look at your engine emisions sticker under the hood, i think your idle is way too high and that is why it moves so easily when in gear. it could be 1 of several sensors not working right, check your engine codes it might tell you which one is shot
good luck

Only thing is that Z28's in 1986 had a 305 TPI, the guy I bought it off of had the original engine taken out and a 350 TPI bored over to a 383 stroker put in it. So idk if the emission sticker will match it. My dad's pretty sure it's the IAC, but I'm just trying to cover all the bases. When I read your idle problem on the IROC youre getting I almost wondered if our problems are similar.

Just found out that the emission sticker is gone, so cant go by that.

[GRASSHOPPER]

you might have to just start trial and error on the sensors, i have the manuals from the factory shops but i have not had the time to look them over yet
if i find anything i will let you know, but i don`t know when i will have the time