1999 GMC Safari extremely high idle

1999 GMC SAFARI
80,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JUNKYARDDOGMN
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  • 1 POST
My Gmc safari has recently taken a dip in a water filled ditch and after changing all the fliuds ,plugs and wires and the converter it still wants to idle at 2500 RPM ,,, the code scanner reads cylinder # 2 mis fire but the motor sounds good
Apr 3, 2008 at 12:15 AM
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MERLIN2021
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That P0302 could be caused by a stuck injector...cuasing too much fuel to that cylinder, and maybe the high idle, unplug that injector and see if it idles lower...if yes replace the injector. Get a noid light and test the injector harness for any short, it could be holding contant power instead of pulsing...
Apr 3, 2008 at 12:58 PM