hi idle

Asked by GuruVK1CW Sep 02, 2018 at 03:29 PM about the 1988 Pontiac Fiero Formula

Question type: General

my 88 v6 with no pollution on it idles high  any info would good

3 Answers
44,030

Hornet_2497 answered 6 years ago

There's no carburetor to adjust so I would be looking for a massive vacuum (air) leak on the intake side of the engine. If the pollution controls have been removed, look for some unplugged vacuum ports. A leaky brake canister can have a vacuum leak too. Check for lose intake manifold bolts. Sometimes you can hear a large leak.

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103,455

KenF answered 6 years ago

Agree with above, look for a vacuum leak. You can also locate a leak with a tiny spritz of starting fluid around the intake with engine running, if engine surges you found the leak.

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