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DDaHoe replied to the thread 1997 5.7 Vortec misfire/stumble.No build up at all looked like they had been changed within 30k miles or so. Truck only has 120k original miles and doesn't smoke or...
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DDaHoe replied to the thread 1997 5.7 Vortec misfire/stumble.It doesn't happen necessarily when the converter locks up but it's present while the converter is locked up. In other words I don't feel...
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DDaHoe replied to the thread Microsecond misfire at hiway speed.Hey man appreciate your response. I'm a 25 year auto tech and this is my personal vehicle so I only get to mess with it here and there...
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DDaHoe replied to the thread Light misfire at 75mph.Did you ever figure this out? I'm experiencing the exact same issue with mine. I'm so tired of it I may just swap out for this 6.0 lq9 I...
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DDaHoe replied to the thread Microsecond misfire at hiway speed.I'm having this exact same issue and seems other have experienced it as well but nobody has revealed what their eventual fix was. I have...
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DDaHoe replied to the thread 1997 5.7 Vortec misfire/stumble.So after diagnosing the now current no spark issue, I found that the brand new NAPA coil failed after a few hundred miles. I temporarily...
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DDaHoe replied to the thread 1997 5.7 Vortec misfire/stumble.It has been the same for a month now but finally it randomly stalled out in a parking lot and will not start. Yay now I can fix it! Lol...
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DDaHoe replied to the thread 1997 5.7 Vortec misfire/stumble.Ok so I have been looking at all of the relevant data and can't see anything on the input side of things. Crank signal holds steady, TPS...
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DHello everyone I have a 1997 Suburban that's giving me a fit. Generally can diagnose anything but after thinking for a few weeks and...
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