BMW F30 ignition faults and misfire
320i328i
F30 jerks and gives misfire codes after changing the spark plugs, what to do?
A misfire means a cylinder is not firing properly. Fit new spark plugs in the cylinders that report the fault. If the jerking continues, replacing the ignition coils is the next option.
F30 328i (N20): what causes idle vibration even though there are no fault codes?
The cause can be a leaking injector that wets the spark plug and cuts the spark. The plug is then black and smells of petrol. Another possible cause is the camshaft position sensor. Checking the timing chain alone did not remove the vibration.
F30 320i (N20): no spark on one cylinder even though the coil and plug have been replaced?
If the compression pressures are even and the other cylinders spark, the fault may be in the engine control unit. The unit can be repaired, but the diagnosis is best left to a workshop.
Related articles
BMW F30 330e high-voltage battery and electric drive faultsBMW F30 battery drain and chargingBMW F30/F31 automatic jerks or pulls away slowlyBMW F30/F31 steering rack rattle and noiseBMW F30/F31 iDrive and display faultsBMW F30/F31 xDrive transfer case faultsBMW F30 brake service and common faultsBMW F30/F31 rumble and vibration while driving