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Thread: Still sputter sputin 1991 e32 735i with strange idle

  1. #1
    Join Date
    Jan 2007
    Location
    Dayton Ohio
    Posts
    1,483

    Default Still sputter sputin 1991 e32 735i with strange idle

    Still having problems with this 1991 e32 735i. It is idling up and down.
    I have tested:
    New O2 sensor
    Full charge on battery
    Spark plugs
    rotor and rotor cap
    vacuum leak
    throttle body
    Smoked intake no leaks
    afm
    fuel pressure
    Clamp off evap system

    I have attached a link to the video.
    http://vid273.photobucket.com/albums...nny%20idle.mp4

  2. #2
    Join Date
    May 2004
    Location
    Sydney, Australia
    Posts
    2,699

    Default

    leads / ignition wires?

  3. #3
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,249

    Default

    That really sounds strange. Have you checked the fuel pump? Maybe it is going to die? At least you can check the volume like this http://bmwe32.masscom.net/sean750/fu...Regulators.htm
    Nominal data:
    The M30 fuel pump is originally Bosch 0 580 464 995
    operating pressure is 3 bar
    conveying capcity at 12 V 1.9 liter/minute
    conveying capacity against counterpressure 875 ccm/30 seconds
    Power consumption is 5A

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