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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Problem Solved! I figured out what was wrong! In my original post, I mentioned that I checked the pre-cat exhaust pressure as less...
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Hello Fless, thank you again for your suggestions. I tried pulling all 4 oxygen sensors and the engine still runs bad with near...
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Hello again Marky, per your suggestion I swapped the entire bank 1 set of coils with bank 2. Unfortunately the misfires are on the same...
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Thanks DodDel, I'm just curious, since the engine has a single camshaft wouldn't a cam timing issue affect both banks equally? Thanks...
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Thanks rockola, I checked the fuel pressure today. It's rock solid 62psi at any rpm. Also brand new plugs and wires. I took off engine...
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Thanks Fless, those are some great suggestions. I'll get that information!
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Llos341 replied to the thread SOLVED Please help, engine runs very poorly!.Thank you Marky, I'll try swapping coils and checking engine to chassis ground quality. Carl
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LHello, I have a recently acquired 2005 GMC Yukon XL 1500 SLE with a 5.3L flex engine. It's been running poorly ever since I got it...
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