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SoCalSlaughter · 08-17-2010, 05:50 PM

The the brown wire is disconnected and I set then timing to 0, the advance a few. And all the vacuum likes are new. Have a vacuum gauge hooked up to it and at idle in gear it reads about 14psi. And the whistle is coming from the IAC. When i stick my finger in the valley where the IAC pulls air, the whistle stops.

08-17-2010, 05:50 PM	#3
SoCalSlaughter Registered User Join Date: Aug 2010 Location: Ventura Posts: 151	Re: 1990 Chevy Suburban idle/accleration problems The the brown wire is disconnected and I set then timing to 0, the advance a few. And all the vacuum likes are new. Have a vacuum gauge hooked up to it and at idle in gear it reads about 14psi. And the whistle is coming from the IAC. When i stick my finger in the valley where the IAC pulls air, the whistle stops. Last edited by SoCalSlaughter; 08-17-2010 at 05:51 PM.