Question about 1988 Chevrolet Camaro

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88 camaro poor idle when engine is warm

I have a 1988 camaro iroc-z and when i first start it up it idles good then after it warms up it idles horrible... 500 rpm up to 1200 or so and back and forth the timing is good and so is the egr valve...

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  • dtmeinders May 24, 2009

    its a 5.0 and i checked for an IAC valve but found none and it is too old for a mass air flow sensor, it has a throttle body on it and i sprayed carb cleaner all over the intake and the vacuum lines and no leaks... some lines are cracked but it did not affect the idle at all.

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  • Chevrolet Master
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Don't remember if they used an idle air control valve or mass air flow sensor on ones that old but either can do that. If not check your vacuum hoses for splits, cracks and good connections. You did not list engine size, but controls are pretty much the same. I'm pretty sure you can do a computer scan on those by jumping the under-dash connector...get a manual for codes and instructions on that.
good luck!

Posted on May 23, 2009

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