1989 Gmc C1500 Throttle Body Recently Started Idling Down Will Idle Real High

1989 GMC C1500
26,000 MILES
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CATHY PAYTON
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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?
Feb 10, 2013 at 1:30 AM
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MHPAUTOS
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Clean throttle body and IAC with throttle body cleaner and scan for any unresolved fault codes start here.
Feb 10, 2013 at 1:35 AM
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CATHY PAYTON
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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.
Feb 10, 2013 at 1:51 AM
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MHPAUTOS
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may be electrical, but i would base my checkes around the IAC have you tried a know good one as a test?
Feb 10, 2013 at 1:58 AM
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CATHY PAYTON
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No. Sorry but whats the iac?
Feb 10, 2013 at 2:03 AM
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MHPAUTOS
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Idle air Control motor.
Feb 10, 2013 at 4:13 AM
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