Question about 1991 Isuzu Impulse

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High idle, surge when idling

High idle ,surge when idling

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  • Anonymous Mar 21, 2014

    what is causing the idle to surge up and down when i turn the heater fan on

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It's a failed idle air motor, fairly simple , get a new one first and it's just a few bolts and one wire plug, right at or near the throttle body

Good luck, if that doesn't fix it it's the computer

Posted on Aug 31, 2009

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Posted on Jan 02, 2017

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