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Thread: 330i Touring misfire when warmed up

  1. #1
    Join Date
    Jul 2020
    Location
    Surrey UK
    Posts
    1
    My Cars
    E46 and E39

    330i Touring misfire when warmed up

    Not had this car long. I have little experience of BMWs so please bear it in mind that I might not understand all help in the first instance.

    Engine runs/drives OK when cold but when warmed up it misfires at idle and when driving lacks response.

    When its warmed up I disconnect the MAF sensor and the idle is much smoother. This was disconnected when I bought the car, so I changed it for a new sensor but now just misfires the same as before.

    Anyone had the same problem that can help please?

  2. #2
    Join Date
    Nov 2006
    Location
    Oxnard (Ventura), CA
    Posts
    4,045
    My Cars
    99528it 02525it 04325it
    Read the codes and go from there. It's costly if you start guessing.

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