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Old 07 Sep 2010, 05:01 pm
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Default what would make my 1999 isuzu rodeo idle to high?

what would make my 1999 isuzu rodeo idle to high?
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Old 07 Sep 2010, 05:16 pm
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A vacuum leak could cause that.
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Old 07 Sep 2010, 05:31 pm
Join Date: Aug 2007
Posts: 63

Most common is a vacuum leak but every now and then a IAC= idle air control valve will hang up and not compensate as it should and cause a high idle. Listen to the engine compartment at idle and see if you don't hear a hissing sound. A piece of garden hose held to your ear and the other end passed over the engine will help to identify where the leak is coming from Good Luck.
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