1989 Buick Century Start Engine Idles Real Fast Changed Iac Valve

1989 BUICK CENTURY
129,000 MILES
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ANONYMOUS
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Start engine and it idles real fast I have changed the IAC valve
Oct 22, 2012 at 1:00 AM
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CARADIODOC
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
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.
Oct 22, 2012 at 1:10 AM
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