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    Re: Mercedes C200 Kompressor (WDB203045) X plate Archived Message

    Posted by Dave Hill on June 4, 2007, 9:40 pm, in reply to "Mercedes C200 Kompressor (WDB203045) X plate"

    Evening all

    This one looks to be taking a turn for the worse. It came back for the new (Bosch) O2 sensor. The emissions are now within spec & fuel trim looks good, but still the ugly looking O2 sweep is present although it does now stay within acceptable voltage limits. I checked the variable cam timing actuator (front of inlet cam) & sure enough it’s soaked in engine oil. There is no evidence of oil creeping onto the loom though. Unless the oil is seeping through the wires rather than the binding of the loom.

    It came back today with the driver complaining of a severe misfire immediately after start up from cold. He ran it for a minute or two & switched off and then upon restart it was smooth again although the MIL was still on. I scanned it today (Launch) & got the following codes...

    P201B Misfiring of cylinder 2 fueling deficiency
    -128

    P201B Misfiring of cylinder 3 fueling deficiency
    -032

    There was also a code on the original scan that I forgot to mention....

    P200B B6/4 (Left intake camshaft hall sensor) no signal (P0340)
    -001

    I scoped the MAF & O2 together & the O2 response time looks ok. I also scoped the injector PW vs O2 sensor & again it looked to be good. The MAF output at WOT is 400mv. As this is an auto with a rev limiter (4,000 rpm) I think that is an acceptable output.

    I have been told by a few top guys that this sounds like oil in the loom & possibly ECU. I have to say though that there just doesn't seem to be enough oil to cause that much of a problem. Can the oil really travel through the wiring, inside the insulation?


    Spot the error in this image!


    Thanks for looking

    Dave (Hill)

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