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Thread: Why wouldn't this damn thing run!!!!

  1. #1
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,793
    My Cars
    Supercharged 850ci

    Why wouldn't this damn thing run!!!!

    Could it be the fuel pumps? Naahhhh dont think so (Our parts car...many years in bad gas and low fuel level).





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    Last edited by dragon850; 08-11-2017 at 01:30 PM.

  2. #2
    Join Date
    Jul 2007
    Location
    Iceland
    Posts
    4,682
    My Cars
    BMW 850
    I need to check mine out. Have not checked the pumps filters and air filters for 9 years now.

  3. #3
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,146
    My Cars
    koenig ks8 /e31 850c
    UNLEADED FUEL causes this and old age, our pumps use the fuel as a lubricant.
    i changed both pumps/ filters/ rubber fuel lines last year and found identical looking pumps to yours,also found black rubber granuals in the tank.
    our rubber fuel lines are not suited to unleaded fuel.

  4. #4
    Join Date
    Jun 2009
    Location
    San Jose CA
    Posts
    676
    My Cars
    1991 850i S70 6 speed
    Wow..... is that a fuel filter in the second pic, or I should say used to be a fuel filter?


    Quote Originally Posted by dragon850 View Post
    Could it be the fuel pumps? Naahhhh dont think so (Our parts car...many years in bad gas and low fuel level).





    Sent from my SM-G925T using Tapatalk

  5. #5
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,793
    My Cars
    Supercharged 850ci
    No its the fuel pump in the second pic lol

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  6. #6
    Join Date
    Dec 2014
    Location
    Cleveland Wi
    Posts
    169
    My Cars
    2011 BMW 135i coupe
    Also, its the ethenol that breaks down the fuel lines. Find the 100% gasoline.

  7. #7
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    3,842
    My Cars
    are slow
    Quote Originally Posted by Joe850V12 View Post
    Also, its the ethenol that breaks down the fuel lines. Find the 100% gasoline.
    Or drive your car.

  8. #8
    Join Date
    Dec 2006
    Location
    Sunny Cali,
    Posts
    8,730
    My Cars
    6.5 second 69 Camaro
    Quote Originally Posted by Fatandre View Post
    I need to check mine out. Have not checked the pumps filters and air filters for 9 years now.
    Be sure and change the strainer on the bottom of the pumps too while in there.

  9. #9
    Join Date
    Jul 2007
    Location
    Cave Creek, AZ
    Posts
    1,117
    My Cars
    1993 850ci 2001 M5 / Z3M
    Could that corrosion be from water in the fuel? Ethanol is hygroscopic, and attracts water.

    I treat my gas with ISO-HEET to remove water from fuel 2 times a year, a good practice even in warm climates.
    Regards,

    Brian
    Cave Creek, AZ

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