Mechanics

ENGINE IDLE TOO FAST

1993 Ford Aerostar

Engine Performance problem
1993 Ford Aerostar 6 cyl Two Wheel Drive Automatic 170000 miles

engine idles at 2000 rpm, throtle body butterfly is closed and does not seem to have a vacuum leak. Started when I had alternator replaced at local shop. They said it was a cracked hose from the air filter to the throtle body and taped it up but still idles fast.
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Glrbird
January 27, 2010.




First, you never, never tape a hose up, you replace it! As for your issue, it does sound like a vacuum leak. The best way to find one is look for the area that has a loud sucking sound or spray carb cleaner all around the engine while it is running, if the idle increase then that is where your vacuum leak is.

Tiny
David07722
Jan 27, 2010.


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