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Idle speed
1991 Isuzu Trooper

Idle speed

(1991 Isuzu Trooper)
every time you start the trooper it idles really high all the time at 25000 rpms
2 answers & 0 comments
Popular Answer
on January 11, 2011
sounds like either a vaccuum leak or the idle air control motor is defective.

Roy
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General Diagnosis
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on January 11, 2011
sounds like either a vaccuum leak or the idle air control motor is defective.

Roy
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of SCE Small Car Enterprises on January 11, 2011
It should have an idle air control valve. Check to see if its getting power. The valve also could be stuck open. Any other vacumm leaks can cause high or surging idle conditions as well.
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