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- #21
Sounds like a solid plan! Thank you sir!First thing I would do is check the EFI temp sender. Make sure it specs out. Second is I would find another ecu and give it a try.
3rd you have sludge in your motor. It's going to cause the black oil until it's all gone. Seafoam can help over a long period of time.
On the cats. Get a shop vac or leaf blower and put the tube on one side of the cat and fee your hand at the exhaust tip. Do both cats flow the same? If so is the flow fairly close to what the leaf blower or vacuum is reading? Could mean a cat is clogged or you have a restriction in the muffler. Have you tested the EGR? Also look at wire harness going through top of motor. Does moving it cause any issues?
Lastly what are your compression numbers?