1999 Chevy Silverado engine missfire

1999 CHEVROLET SILVERADO
170,000 MILES • V8 • 4WD • AUTOMATIC
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BERT_PERAULT
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i recently asked a question about my chevy missfiring. you said to clean the injectors i just ran a bottle of injector cleaner through it and it did not help so i took apart the throttle body and cleaned it but it still does it. at first startup it runs good but after 20 minutes of running it starts to miss at idle, or it idles fast at about 1000 rpm.
Aug 5, 2008 at 11:43 PM
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