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Thread: Bogged start then dies!?

  1. #1
    Join Date
    May 2012
    Location
    Baytown
    Posts
    192
    My Cars
    1986 e30 & 1991 850i

    Bogged start then dies!?

    On 1991 e31 I haven't started it a while I went to jump it today and she was difficult to start once it started and stayed running it bogged every time I touched the gas. I turned her off and haven't been able to get her to fully started up and stay running.
    I considered the problem being the intake I installed but I've started her and she was running steady every time before this.
    Could it be injectors
    Fuel filter
    Or fuel pump
    ?????

    Thanks for any insight

  2. #2
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,377
    My Cars
    EXOTICS
    Hook it up to a fuel pressure gauge.

  3. #3
    Join Date
    Jan 2011
    Location
    Nottingham, UK
    Posts
    1,033
    My Cars
    E31, E36/7, E61
    Low battery voltage?

  4. #4
    Join Date
    May 2012
    Location
    Baytown
    Posts
    192
    My Cars
    1986 e30 & 1991 850i
    Im pretty I found the problem
    When cleaning the engine bay I got water around my plugs.
    Rigged up the vacuum with a straw and got all the water out off the banks
    Now letting it dry completely

  5. #5
    Join Date
    May 2012
    Location
    Baytown
    Posts
    192
    My Cars
    1986 e30 & 1991 850i
    tried starting same results. The carbon filter sensors had water in it letting that dry out as well as the three prong plug next to it to the left. Is there anything besides the ignition coil being wet that could cause this.
    The passenger side exhaust is very healthy.driver side is weak and sputtering. It did this before but would clear up after warming a little and giving her a little throttle

  6. #6
    Join Date
    May 2012
    Location
    Baytown
    Posts
    192
    My Cars
    1986 e30 & 1991 850i
    Same results. Gonna buy code reader (peake)

  7. #7
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,736
    My Cars
    11/88 E32 750iL+98 E36M3
    Could be some things which come to my mind
    -throttle valves need cleaning as they are out of sync for more than 2%, then it goes into limp mode
    one of the fuel pumps could be on the way out, check fuel pressure
    fuel pressure regulators to be checked, pull off the vacuum hose and see if there is fuel dropping
    crankshaft position sensors to be tested, 540 +/- 10% Ohm
    Shogun tricks and tips for the E32 series are HERE!

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