Idle control valve location

[sparky]

I have no idea where the idle control valve on my 1991 Nova GSI, its doing my head in, cant find it in the Haynes manual either. :confused:

[MK999]

as you look into the engine bay from the front it's on the back of the block on the LHS usually, bolted to the engine with 2 pipes coming out of it and an ecu plug.

[sparky]

Cheers I'll have a look, the engine isnt idling well at all.

[craig green]

Check for any holes in the rubber inlet pipe between AFM & TB. It'll idle awfully if that is splitting.

[sparky]

Whats a TB?

[craig green]

Throttle body. The butterfly by which air is allowed into the engine, you press the accelerator pedal & it opens via a cable. ;)

[sparky]

I know what a throttle body is, didnt know the terminology. I think that pipe is ok.

[craig green]

I wasnt takin the pish, just being my usual dictionary of PC nonsense.
Make sure it is, remove it & inspect it for cracks etc. Likewise any leak in the inlet will hurt the idle, so you can spray some carb or brake cleaner around when its running, if a leak sucks it in you'll hear it as the idle speeds up.

[sparky]

Ok cheers, I'll remove it and have a look.

[sparky]

Well, can't see any splits in the rubber inlet pipe, and as the Idle control valve is a sealed unit, I dunno what I can do there either, made it idle a bit better by adjusted that small nut on the valve, and adjusted the idle speed on the inlet manifold, but I think I'm cheating and there is some other unlying problem.

Its got a Pipercross induction kit on it, wonder if thats messing up the idle.

[sparky]

Induction kit isnt messing it up, put a normal airbox on it, also revs drop a lot when I switch on lights, blower etc............