Long, and related to EFI ( was Re: PCV valve for TPI)

[Patrick G. Moore]

Oh yeah,

That was the problem with my 88 4.3 Astro.  Idle too high and IAC
counts at 0.  Leaking TB gasket.  Try spraying TB cleaner in various
places to see if idle speeds up.  This is how I found it.

Good luck
Pat

Dave Zug wrote:
> 
> Your throttle stop screw is set too far out, or you have vacuum leaks in the
> plenum. Try to think of the last few things you 'changed' in the intake
> system.
> If closing the throttle stop screw fixes it, do not stop there.. fix the
> plenum leaks if they are there. Dont use leaks as minimum air.
>
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