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Poor idle, surging etc 124 260e - Resolved

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by emimec, Oct 24, 2012.

  1. emimec

    emimec Senior Member

    Likes Received:
    May 3, 2010
    Your Mercedes:
    1989 124 series 260e, 1992 124 series 260e (written off, used as spares), 1991 260e 124 series
    Update to my previous posts relating poor idle, revs surging and cutting out etc.

    It seems my problems were a mixture of 3 things. In trying to cure one problem, others were missed until I went over things again last week.

    1st. I had a leaking fuel pump

    2nd. the dreaded ign amp was breaking down to the point of complete failure.

    3rd. The most impotant one, the OVP relay had an intermittant fault. This was changed once before, but as it didnt cure the surging problem, and was put back. Unbeknown to me, it was the cause of the poor idle and cutting out at idle.

    During the problem solving venture, the injectors were replaced with new ones, and I have to say, that alone makes the car run smooth and responsive, so well worth doing, even though it wasnt really needed to cure my problems.

    Donor car now on ebay !!!! Confidence eh !!!

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