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Brown sludge in engine
What does the coolant look like? Any evidence of flood damage?- hdrox88
- Post #2
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
I suppose that is possible considering 240K miles and who knows what kind of maintenance. Unfortunately I don't have a dial indicator to check it myself.- hdrox88
- Post #15
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
The truck was purchased as is(no cats) so there is no telling on tuning come to think of it. I would be inclined to think that the miss would occur on more than one cylinder if it were related to not having cats. Maybe I am wrong? The tech working on the truck said pushrods looked good and...- hdrox88
- Post #13
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
It is currently throwing P0300 random/multiple misfire. I just got it back from a trusted repair shop for bad intake seals determined with a smoke test. It got better, but not 100%. They also did a top engine clean to remove carbon build-up but it made no difference. It still has a #4 misfire at...- hdrox88
- Post #10
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
The truck has been sitting for the past few months and I decided to try to give it another go. Ok, still have the same problem with this thing. I swapped plug, wire, coil pack and injector again to another known firing cylinder and still seems to be no 4 that is missing. Pulling the connector...- hdrox88
- Post #7
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
I compared the resistance on the coil packs and the plug wires and there was minimal difference. I figured that swapping the parts I mentioned from the non firing cylinder with a firing cylinder would tell me what parts were bad, but the misfire remains on cylinder 4.- hdrox88
- Post #5
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
I tested the problem cylinder psi and got 175, the cylinder just in front was 180 and then I checked a cylinder on the opposite bank and got 176. The parts were swapped one at a time, checking the code each time. I have a OBD2 scanner. I'll have to double check the pins in the connector, but...- hdrox88
- Post #3
- Forum: Engine & Drivetrain
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02 tahoe misfire - ran out of ideas
My cousin just recently acquired a 2002 Tahoe 5.3 with about 240k miles on it. SES light was on and was showing P0300 random/multiple misfire. I cleared the code and started the engine to see if/when it came back on. After a few minutes at idle the SES came on flashing. I shut it down and...- hdrox88
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- Replies: 14
- Forum: Engine & Drivetrain
