Mechanics

GMC C1500 THROTTLE BODY PROBLEM

1989 GMC C1500 • 26,000 miles

I have throttle body. It has recently started idling up and down. Then it will idle real high like choke is sticking, but I thought throttle body didn't have a choke. It sometimes dies when put in gear and boggs down. Any suggestions?
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Cathy payton
February 10, 2013.




Clean throttle body and IAC with throttle body cleaner and scan for any unresolved fault codes start here.

Mhpautos
Feb 10, 2013.
Already did that and replaced sensors, fuel filter, plugs and wires. Even took it to shop and they couldn't fix it. I'm stumped.

Tiny
Cathy payton
Feb 10, 2013.
May be electrical, but I would base my checkes around the IAC have you tried a know good one as a test?
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Mhpautos
Feb 10, 2013.
No. Sorry but whats the iac?

Tiny
Cathy payton
Feb 10, 2013.
Idle air Control motor.

Mhpautos
Feb 10, 2013.

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