engine idles very high I replaced then intake manifold gasket?

1995 PONTIAC GRAND AM

140,000 MILES • 6 CYL • FWD • AUTOMATIC

BWEIDNER

MEMBER
1 POST

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 12:27 PM

RASMATAZ

✓Experienced Mechanic
75,988 POSTS

Could be the throttle body/plate binding, acclerator linkage, idle air control valve, throttle position sensor and false air leakage.

Dec 13, 2007 at 3:57 PM

STRAILER

✓Experienced Mechanic
55,682 POSTS

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

Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Oct 2, 2024 at 9:41 AM

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engine idles very high I replaced then intake manifold gasket?

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