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[SOLVED] 2004 Tahoe Random Misfire
Welp - I found the issue today. I decided to pull the intake off and verify the intake manifold was not cracked, as I had a feeling this was vacuum-related. Inspected each intake port on the head, and lo and behold, cylinder #7 had a socket wedged in between the valve and sidewall. I tried...- MatthewEcu
- Post #9
- Forum: Engine & Drivetrain
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[SOLVED] 2004 Tahoe Random Misfire
Here is what I have so far to answer your questions and greatly appreciate the help: Key on, Engine off, fuel pressure is 48 PSI - Running Fuel pressure is 42 PSI. Brand new Delphi fuel pump, and the research I have done on the FLEX fuel shows this is normal. I replaced the fuel filter about 6...- MatthewEcu
- Post #7
- Forum: Engine & Drivetrain
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[SOLVED] 2004 Tahoe Random Misfire
Quick update - Thanks for all the replies. I will do the crank re-learn procedure tomorrow with new scanner, my current ghetto scanner did not have that option. I cant keep it idling right now so whatever the issue seems to be has progressed from a #2 and #7 misfire to running like absolute...- MatthewEcu
- Post #5
- Forum: Engine & Drivetrain
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[SOLVED] 2004 Tahoe Random Misfire
Background - this is the L59 FLEX engine, V8 I had an awful oil leak coming from the oil pressure sensor/camshaft sensor (I wasn't sure which one), so I decided to go ahead and pull the intake manifold to make it easier, and I knew the gaskets had never been replaced. Everything went well, and...- MatthewEcu
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- Replies: 12
- Forum: Engine & Drivetrain
