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Car shaking/juddering when idle

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  • Car shaking/juddering when idle

    Hello Everyone,

    I am new on the forum. I have a DS3 D-sport 155 THP with forged CP 10.5cr pistons, forged zrp rods, td04L turbo, RCZ-R intercooler and chrome boost pipes, AEM W/M injection, Tial 38mm External Wastegate, 76 mm Downpipe and straight pipe, BMW F30 3.28 coils and RCZ-R spark plugs.

    I have juddering problem on idle. When cold start, it looks like there is no problem. After getting hot, the engine shakes the car. I feel it on the seats. (Also in my neigbourhood there are THP cars like 207,DS3, 208, so I can feel more shaking clearly.)

    Also I have a black smoke problem. Whenever I step on the gas halfly or fully (doesnt matter), I can see black smoke on the exhaust.

    When I check the oil, I can smell the odor of gas on the oil.

    Except above problems, there is no problem on full throttle like missfire, stutter etc.

    I changed my coils with oem ones, these problems are still ongoing.

    So, Can you give me some advice?

    Thanks in advance.

  • #2
    carbonisation of the inlet valves? Needs a good decarbonisation

    welcome to the Club
    sigpic
    Jog on Noddy

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