Mechanics

ROUGH RUNNING...

GMC Other

I have a 1990 Serria, two wheel drive, with a 305 motor and it runs well on the highway but terribly at a light or slowly into my driveway. Changed the plugs, the wires are good, changed the fuel filter, sprayed carb cleaner. I'm running out of ideas.
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Quig
February 24, 2007.



Have you checked the iac yet iyt is located on the side of the throttle body, that bugger may be your problem, is the check eng light on?
Let me know

jim

Tiny
CHEVYII
Feb 24, 2007.