My truck had developed a stumble and backfire only when the engine is cold. After a minute on the road it runs like a champ. No SES light or any other warning.
1999 Chevy 5.3L with a whopping 51,000 miles.
Any ideas?
Thread: 1999 Chevy 5.3L issue
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1999 Chevy 5.3L issue
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11-14-2009 11:04 AM•_•_•_▬_▬_▬_•_•_•
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11-14-2009 11:13 AMMaybe intake manifold gaskets. My cousins truck did the same thing and that's what it was. It never showed an idiot light, but I think it showed a fault of some kind on the scan tool if I remember right. It has been a while.
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11-14-2009 11:28 AMI have Diacom marine software. I wonder if it'll work on a truck
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11-14-2009 11:47 AMI forgot to mention, it starts and idles just fine. It only stumbles when I try to accelerate.
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11-14-2009 08:55 PMIt is the intake gasket, they leak cold and since the computer is not in closed loop, it will not pick up the lean condition.
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11-14-2009 09:03 PMThanks Ted. From what I've been reading online, this is a common problem. I want a new truck anyway
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