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Old August 28th, 2010, 08:22 AM
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Rich Campbell
06 LR3 01DII D90s sold
Join Date: Oct 2003
Location: PA
Posts: 1,512
Engine running rough now a knocking

I did a search and could find an answer. My 90 runs a little rough, seems to have power ok. I unplugged the MAF and such to see if it went away and it didn't. It did set off my check engine light which had the code p0102 but I think that was because I was unplugging things. Since then I have developed knocking during acceleration, not at idle. The rough running seems worse at exactly 1600rmp. I cleaned the PVC and air filter. The spark plugs are fairly new. Going to try wires next. I cleared the code and it hasn't come back.

Things I'm going to try,

Change oil to 5w 30 syn
Change Fuel Filter
Change spark plugs and wires

I want to remove and clean the stepper motor but not sure where it is on my 4.0. Anyone have a picture?

Anything else I should be looking to check? I'm not getting any codes.

Thanks as always
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