Question about 1999 Chevrolet Silverado 1500

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I have a 99 silverado z 71 with the 5.3 engine with 235.000 miles we had a problem with starting it when it was warm found out it was a bad fuel pressure regulator replaced it now it starts all the time but has a problem at idle it just idles up and down only about 5 to 6 hundred rpm but bad at redlights and stop signs kind of lunges at person in front of you

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I have a 1999 Chevy Silverado 5.3, It won't start. I drove it home, parked it, and the following morning it wouldn't start. On a couple of occasions, i have had a difficult time starting it. On both of those occasion, I waited about 30 minutes, then cranked it and it started with no issues following. I have replaced all the spark plugs, spark plug wires, fuel filter, fuel pressure regualtor, crank postion sensor, I have cleaned all the injectors, checked the injectors with a noid light. I have checked the fuel pressure what matched the specs in the repair manuel, checked all the fueses, i have a fully charged battery, what should i try next, taking it to a dealer? I have not replaced the fuel pump, that was the last thing i wanted to replace. any suggestions?

Posted on Jan 31, 2010

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