START ENGINE AND IT IDLES REAL FAST I HAVE ...

1989 Buick Century

Tiny

Anonymous

October, 22, 2012 AT 1:00 AM

Start engine and it idles real fast I have changed the IAC valve

1 Answer

Tiny

caradiodoc

October, 22, 2012 AT 1:10 AM

Check for a vacuum leak in the hoses and intake manifold gaskets. When the engine is still cold, spray water on those parts while the engine is running. If you see the water get sucked in and the speed slows down for a few seconds, you found the leak.

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