Results 1 to 5 of 5

Thread: e34 m50b20 NV shuts down when cold

  1. #1
    Join Date
    Mar 2018
    Location
    poland
    Posts
    84
    My Cars
    e34 m50b20 '95 NV

    e34 m50b20 NV shuts down when cold

    Hey there, bought a e34 '95 m50b20 non vanos recently, automatic gearbox, it had the problem from the beginning, the engine starts nicely since 1 spin, revs good, has "ok" acceleration and doesht choke, but i cannot start driving before the temperature reaches its peak, untill then the RPM drops below 500 and the engine shuts. Once the temperature is on its peak it doesnt shut anymore but the RPM stays very low, so low the car shakes badly on every red light and the engine doesnt run smooth on low rpm, sounds like it doesnt fire on every cylinder. All this doesnt happen once i hit the gas.
    Where can i look for clues?

  2. #2
    Join Date
    Jul 2007
    Location
    Oldham UK
    Posts
    3,185
    My Cars
    '00 330i Sprt '92 525i
    A '95 car should have vanos as per the top photo in this link. Non vanos looks like the second photo
    https://en.wikipedia.org/wiki/BMW_M50
    Your idle control valve may not be working, you could have a vacuum leak or a bad coil

  3. #3
    Join Date
    Mar 2018
    Location
    poland
    Posts
    84
    My Cars
    e34 m50b20 '95 NV
    Oh damn, i think i got the vanos then...
    This is a short movie of how the engine works on idle
    https://www.youtube.com/watch?v=CPbl...ature=youtu.be
    Can you tell me from the move if this is the vanos?
    If so, can it be faulty of all this?

  4. #4
    Join Date
    May 2017
    Location
    Perth, Western Australia
    Posts
    1,101
    My Cars
    09/90 E34 525i (M50)
    Doesn't vanos make a particular noise when failing? I wouldn't know as mine is NV.
    But anyway, start with the basics:
    Quote Originally Posted by whiskychaser View Post
    Your idle control valve may not be working, you could have a vacuum leak or a bad coil
    When I got water in my sparkplug wells (and the boots were stuffed) it ran like that in the video, So I guess start wiith coils and plugs. Then vacuum lines.
    Last edited by fo3; 03-20-2018 at 11:55 PM.

  5. #5
    Join Date
    Mar 2018
    Location
    poland
    Posts
    84
    My Cars
    e34 m50b20 '95 NV
    the coils and plugs have been changed by previous owner recently, gotta check the vacuums then. Im rly concerned about the vanos now, finding someone that rebuilds this thing is so hard in Poland.
    Anyway, Vanos should work a lot worse on hot engine right? My engine runs better when its hot
    Last edited by shiremux; 03-21-2018 at 06:51 AM.

Similar Threads

  1. Replies: 6
    Last Post: 08-31-2009, 07:02 PM
  2. help: Engine shuts down after cold start.
    By JuM3 in forum 1992 - 1999 M3 (E36)
    Replies: 12
    Last Post: 07-23-2008, 06:33 PM
  3. weird E34 problem... power shuts down
    By zeroforhire in forum 1988 - 1996 (E34)
    Replies: 8
    Last Post: 01-31-2008, 12:47 AM
  4. E34 Problem... Car Shuts down!
    By zeroforhire in forum General BMW Mechanical Help sponsored by RM European Auto Parts
    Replies: 0
    Last Post: 01-30-2008, 02:08 PM
  5. Idle up/down when cold
    By connorb850 in forum 1991 - 1999 (E36)
    Replies: 4
    Last Post: 11-07-2006, 02:15 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •