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Thread: 2010 E83 X3 N52B30 misfire 4, 5, 6,

  1. #1
    Join Date
    Jan 2019
    Location
    Huntersville, NC
    Posts
    3
    My Cars
    2010 BMW X3

    2010 E83 X3 N52B30 misfire 4, 5, 6,

    After start it runs good for couple of seconds, then starting misfires in cylinder 4, 5, 6. Replaced spark plugs, switched coils between banks( 123 and 456). Also it was leaking oil so I replaced valve cover gasket kit, vvt gasket, vvt shaft position sensor gasket. During replacement found that PCV valve membrane was bad so the valve was replaced as well. Result is no changes at all. Also INPA stated faulty VANOS solenoid error code 2A82(intake), switched them and got the 2A87(exhaust) so the bad vanos is confirmed but still Im not sure that bad solenoid can cause whole second bank misfire. Tryed to disconnect both oxygen sensors before converter with cleaning all adaptations. I got this car in this condition and trying to isolate and solve the problem instead of replacing everything. By the way compression is 14 atm in all cylinders. Would be appreciate for any help.

  2. #2
    Join Date
    Jan 2005
    Location
    Maui
    Posts
    460
    My Cars
    E90, E83, E46..Prius lol
    Climb underneath car and check grounding strap. Then, if is is original braided copper wire, replace with one from local auto parts store. Those go bad and cause all sorts of problems. Easy fix and checks a box off.

  3. #3
    Join Date
    Jan 2019
    Location
    Huntersville, NC
    Posts
    3
    My Cars
    2010 BMW X3
    Thanks. Will try this weekend.

  4. #4
    Join Date
    Jan 2019
    Location
    Huntersville, NC
    Posts
    3
    My Cars
    2010 BMW X3
    Secondary converter was clogged. Problem solved.

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