Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Has anything been replaced? Does it lack power under hard acceleration or idle rough?
Rough idle indicates vacuum leak or possibly clogged injector. You can use carb cleaner to spray around intake gaskets, throttle body gasket, vacuum lines ect to see if idle changes. If idle changes check for vacuum leaks in area you are spraying. If you are pretty certain there are no leaks I'd have injectors tested. Let me know if you have questions, thanks.