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Lack/loss of power & Engine hesitation

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    Lack/loss of power & Engine hesitation

    Dear BMW lover,

    I need your help on issue that i m facing with my BMW 523 I 2008 model e60 (196000 km).

    Couple of weeks back, i started to loose power while accelerating in initial position and under 100 km/h. Idle was staying block between 2000 to 3000 tr/min.

    I did a computer check and found below codes :

    No transmission fault

    Engine :

    29CD Combustion misfiring cylinder 1 (p0301) -- Spark plug are fine and changed coil for cylinder 1
    29EO Mixture Control Bank 1 (P0171)
    29E1 Mixture Control Bank 2 (P0174)

    After changing coil acceleration is very hard and loosing power. Car become very heavy.

    I need your support to help me what can be the issue on those issues.

    Thanks in advance

    #2
    Faced a similar issue in the past (wasnt my car).
    What fixed it were new injectors. It could also be your MAP sensor or a vacuum leak, both can cause the misfire.

    Update once fixed :)

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      #3
      Adding to the above in some cases with the E60 the fuel pump or a blocked filter could lead to this , keep the car idling for sometime and listen if there is a loud buzzing noise coming from the rear right wheel area.

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