Hello, I have an e36 318is with a M44B19 block. I just recently replaced the two o rings inside the oil filter housing since it leaked. I've also replaced the disa valve, idle control valve, spark plugs and cleaned the fuel injectors. However, it still had a rough idle when stationary. It would sit around 600rpm and runs rich in emissions.

I would assume it could be a faulty thermostat since my temp gauge sometimes won't sit on the middle. Had the o2 sensors cleaned but it maybe faulty as well.

Any suggestions?

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Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.


- Nick