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W203 C200 Kompressor faltering on idle

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by punkieys17, Nov 6, 2012.

  1. punkieys17

    punkieys17 Member

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    Hi, my wife's C200K estate has developed an annoying fault. It falters when idling and threatens to stall. Its done 130,000 miles.

    The engine light lit up and merely reported a misfire on cylinder 1. I cleared the codes to see what comes back - it occassionally reports a problem with the throttle body - but its occurance is less often than the car is logging the misfire.

    Today I have swapped the coil pack and spark plug with cylinder 2 to see if it moves.

    Over a year ago I checked and found the car did have the oil from the camshaft sensors problem and I fitted a new down stream sensor, cleaned the loom, fitted the intermediary loom fix and checked the ECU end which was completely clear. It was not exhibiting the problem then - luckily I read the forums so reacted before thre leak was too bad.

    What I did not replace at that time was the upstream sensor - is this a posibility? I had purchased a NGK OZA659-EE24 but when I went to look today I am sure the wiring attached is too short.

    So any input on what might be contributing to the problem would be appreciated and a secondary question is where is the connector for the upstream sensor please - I have traced the wire from the upstream sensor and it disappears around the back of the engine above the transmision - where does it actually clip?
     
  2. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Your Mercedes:
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    Got one in at the moment doing exactly the same thing, lumpy idle, stalling and yet goes like a scalded cat on throttle.

    I checked the timing yesterday and its a tooth out on the exhaust Cam and 1/2 tooth out on the inlet cam. It has a stretched timing chain.

    I fear you have the same problem which is becoming more and more of an issue on the 271 engine. I would get it checked ASAP.
     
    Last edited: Nov 8, 2012
  3. OP
    punkieys17

    punkieys17 Member

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    Thanks Steve i will check. - Though its running fine normally - then it will have the odd hiccough - surely it would do it all the time if its mechanical... - but still woirth checking
     

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