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Thread: E24 89 635csi PROBLEMS

  1. #51
    Join Date
    Feb 2009
    Location
    Pittsburgh, PA
    Posts
    1,718
    My Cars
    '86 635CSi, '08 128i
    That's progress! Glad you didn't give up on it.
    Save the manuals!
    '08 128i 6MT, '86 635CSi 5MT (B32, Motronic 1.3, WBO2, G265, 18# FW, 3.46 torsen)
    Past projects:
    '96 318iS, sold 4/23 '90 535iM, RIP 1/23 '90 535iA RIP 6/22 '91 318i, sold 7/19 '97 M3 sedan, sold 11/18 '85 735i, RIP 2/18 '92 325iC, sold 7/16 '91 318iS, sold 6/16 '84 745i, sold 10/14 '82 633CSi, traded 9/12 '90 325i, RIP '87 325 sold '89 525i, traded '87 325iS, RIP

  2. #52
    Join Date
    May 2013
    Location
    Moultrie, Ga. USA
    Posts
    170
    My Cars
    87 635CSi, 88 635CSi,
    Give us some actual numbers. What is your fuel pressure at idle, what is is under load and driving, and what is it when you switch off the car. And yes, the car will barely run without the in tank pre-pump working. If it's running but you haven't pulled it out and visually inspected the sock, the pressure hose and the connections you can't make an assessment of it's condition. This is very likely your culprit. My 88 now has a single hi pressure in tank pump and never been better.
    Last edited by slofut; 04-20-2019 at 02:25 PM.

  3. #53
    Join Date
    Jul 2016
    Location
    Massachusetts
    Posts
    96
    My Cars
    89 635csi, 83 & 82 320i
    Quote Originally Posted by slofut View Post
    Give us some actual numbers. What is your fuel pressure at idle, what is is under load and driving, and what is it when you switch off the car. And yes, the car will barely run without the in tank pre-pump working. If it's running but you haven't pulled it out and visually inspected the sock, the pressure hose and the connections you can't make an assessment of it's condition. This is very likely your culprit. My 88 now has a single hi pressure in tank pump and never been better.
    Issue was solved
    ECU

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