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08-08-2019, 01:54 PM
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#12 |
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Registered User
Join Date: Aug 2010
Location: Ventura
Posts: 151
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Re: 1990 Suburban high idle/whistle from IAC
The idle screw in the throttle body has a metal cap over it, so its not user adjustable. Also, voltage. I'm running a 140amp alternator. I've checked grounds. Any grounds reading over .5 ohm I replaced the wire or fixed. The TPS was recently replaced with an AcDelco unit, no codes present and throttle linkage is free and has full travel. I was getting a code 13 for a O2 sensor. But the ground was reading 1.7ohm. I replaced ground and it hasnt been back on.
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1990 Chevy Suburban v2500 1990 Chevy/Geo Tracker LSi 4x4 2Dr 1996 Chevy/Geo Tracker LSI 4x4 4Dr 2011 Chevy Silverado Crew Cab LT 1991 Nissan 300zx SlickTop |
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| dignostic, high idle, iac, runs rough |
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