engine idles very high I replaced then intake manifold gasket?

1995 PONTIAC GRAND AM
140,000 MILES • 6 CYL • FWD • AUTOMATIC
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BWEIDNER
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I replaced then intake manifold gasket because there was anti-freeze in the oil. After reassembling, the engine starts but the idle is very high no tachometer so I do not know how high. I have checked all electrical connections and vacuum lines, I am unable to find problem.
Dec 13, 2007 at 8:27 PM
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RASMATAZ
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Could be the throttle body/plate binding, acclerator linkage, idle air control valve, throttle position sensor and false air leakage.
Dec 13, 2007 at 11:57 PM
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STRAILER
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I would say the IAC motor is stuck due to rust, here is a guide to help us and I have included the IAC valve location so you can swap it out.

https://www.2carpros.com/articles/engine-idles-too-high

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Oct 2, 2024 at 4:41 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.