Mechanics

REALLY HIGH IDLE OF 5.7 VORTEX

1996 GMC Truck • V8 4WD Manual • 180,000 miles

I have a 1996 gmc pick up with a 5.7 liter vortex and the idle is erratically high going from 2.5 to 1.5 X1000 rpms even after warming up. Do you have any idea what might cause this?
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Nate wakeling
January 29, 2011.




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