Page 1 of 4 1234 LastLast
Results 1 to 25 of 97

Thread: i call on all the 8 series gurus

  1. #1
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's

    i call on all the 8 series gurus

    This one has a bunch of us stumped.
    i had a to take apart most of the top part of the engine last year to fix a coolant leak. I also decided to replace all the hoses in the front and back of the engine. also did the valley pan gaskets too. Since i had the fan and belts off i decided to replace the crankshaft sensors, both of them. Now we've put the car all back together and went to start the car . Its wont start. The starter cranks and it sputter occasionally but wont turn over. The car started before i started all the work. The car did sit for almost 8 months and the batteries had drained once over that time. Here are the things we've tried so far with Advice from the great Wuffer. Check fuel pumps... replaced the links in the trunk... check fuses... check that fuel is going to the rails... checked for spark... I've retraced my steps as well as the other 8 guru
    cdnalpina and we are stumped. We are wondering if it might be one of the new crankshaft sensors since that is the one new part but i want to see if it it could be
    something else before i change those again. Any suggestions?
    Last edited by liquidblueloft; 04-22-2017 at 07:53 PM.

    my Twins 850's and its AMG cousin

  2. #2
    Join Date
    Feb 2013
    Location
    Sarasota, Fl
    Posts
    542
    My Cars
    95 840CI 91 850I
    Need 3 things for it to start spark fuel and compression. I would say you have compression and spark but you do not know if you have fuel past injectors. If you pulled plug grounded it and saw a nice blue spark while cranking.

    I would use a VOM on the CPS's and double check they are plugged into the correct position. I would also look for and loose metal items that might have stuck to the crank cps's
    BMW CCA #500359 E31 Chapter.

  3. #3
    Join Date
    Dec 2007
    Location
    Dallas, TX
    Posts
    10,154
    My Cars
    '93 850Ci- Daily Driver
    Most likely you have the CPS and the cylinder ID sensor wires mixed up (the 4 plugs underneath the oil filler on the front of the motor).
    '93 850Ci - Mineralweiss Metallic
    ALPINA B7 -Alpinweiss III

    BMWCCA E31 Chapter President



    ...the price of cool ain't cheap!

  4. #4
    Join Date
    Apr 2010
    Location
    La Costa, California
    Posts
    1,830
    My Cars
    1994 850CSi #125
    Quote Originally Posted by TxGR8White View Post
    Most likely you have the CPS and the cylinder ID sensor wires mixed up (the 4 plugs underneath the oil filler on the front of the motor).
    Agree - double check them in the repair manual. They're not labeled on the engine, you need to know using the manual.
    Taylor in Carlsbad

    P=(p x v3 x Cd x A)/2

  5. #5
    Join Date
    Nov 2005
    Location
    Langley BC Canada
    Posts
    2,893
    My Cars
    91 850 Panzer
    Also, try pulling the fuse from the DWA module in the passenger side door sill. Dead batteries could have caused the module to lose its mind. That being said, TxGR8White's idea is also very possible!
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  6. #6
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,142
    My Cars
    koenig ks8 /e31 850c
    Quote Originally Posted by TxGR8White View Post
    Most likely you have the CPS and the cylinder ID sensor wires mixed up (the 4 plugs underneath the oil filler on the front of the motor).
    Any pictures of the correct positions? I am in the same boat.
    new cps / pumps / filters ht leads / coils
    starts on 6

  7. #7
    Join Date
    Apr 2010
    Location
    La Costa, California
    Posts
    1,830
    My Cars
    1994 850CSi #125
    http://www.taylorpatterson.com/wp-co...al-Systems.pdf

    Page 11 details the correct connections. (Section 12-14/1)

    If those are correct and it still don't start, Wuffer's comment about the DWA fuse is your next step forward.
    Last edited by taylorpatterson; 04-05-2016 at 01:41 PM.
    Taylor in Carlsbad

    P=(p x v3 x Cd x A)/2

  8. #8
    Join Date
    Oct 2008
    Location
    Mt. Dora, Florida
    Posts
    2,596
    My Cars
    Alpina B12 5.7, 850 CSi
    Here is a picture of the wiring routing.

    Engine Front.jpg
    Editor, E31 NEWS - BMWCCA E31 Chapter Newsletter
    North America Representative, 8er.or Board of Directors



  9. #9
    Join Date
    Dec 2007
    Location
    Dallas, TX
    Posts
    10,154
    My Cars
    '93 850Ci- Daily Driver
    In regard to the 4 connectors, it is very well possible that the plugs are not in the correct position to begin with. I had this on my car way back when. You would be best served to verify where the wire go on the harness end. IIRC, the center two at the harness are for CPS - the wire closest to the driver side goes to the bank 1 CPS, the other one is for bank 2. I will see if I can get a pic later this evening.
    '93 850Ci - Mineralweiss Metallic
    ALPINA B7 -Alpinweiss III

    BMWCCA E31 Chapter President



    ...the price of cool ain't cheap!

  10. #10
    Join Date
    Sep 2006
    Location
    Greater Seattle Area
    Posts
    2,035
    My Cars
    '93 850Ci,'01 X5

    We have the greatest minds in 8erdom chiming in.

  11. #11
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's
    I did check the wires with the manualtwice to see if they were mixed up. They were correct.

    my Twins 850's and its AMG cousin

  12. #12
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's
    Quote Originally Posted by 2001740il View Post
    Need 3 things for it to start spark fuel and compression. I would say you have compression and spark but you do not know if you have fuel past injectors. If you pulled plug grounded it and saw a nice blue spark while cranking.

    I would use a VOM on the CPS's and double check they are plugged into the correct position. I would also look for and loose metal items that might have stuck to the crank cps's
    We did this as well.

    my Twins 850's and its AMG cousin

  13. #13
    Join Date
    Apr 2010
    Location
    La Costa, California
    Posts
    1,830
    My Cars
    1994 850CSi #125
    Quote Originally Posted by liquidblueloft View Post
    I did check the wires with the manualtwice to see if they were mixed up. They were correct.
    Pull that DWA fuse and retry
    Taylor in Carlsbad

    P=(p x v3 x Cd x A)/2

  14. #14
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's
    Quote Originally Posted by Wuffer View Post
    Also, try pulling the fuse from the DWA module in the passenger side door sill. Dead batteries could have caused the module to lose its mind. That being said, TxGR8White's idea is also very possible!
    Will try that next. You must have told that to Rob today.

    my Twins 850's and its AMG cousin

  15. #15
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,142
    My Cars
    koenig ks8 /e31 850c
    Is the DWA fuse near the DWA or under the hood or in the boot?
    also are the cps cables the same length ? Ie 2 dirrerent part numbers.
    my new CPS are identical

  16. #16
    Join Date
    Apr 2010
    Location
    La Costa, California
    Posts
    1,830
    My Cars
    1994 850CSi #125
    Quote Originally Posted by koenig d View Post
    Is the DWA fuse near the DWA or under the hood or in the boot?
    Passenger foot panel under the carpet layer. There is the DWA module with its own fuse.
    Taylor in Carlsbad

    P=(p x v3 x Cd x A)/2

  17. #17
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,142
    My Cars
    koenig ks8 /e31 850c
    Thanks Taylor.
    ks8 is rhd.
    drivers side

  18. #18
    Join Date
    Nov 2005
    Location
    Langley BC Canada
    Posts
    2,893
    My Cars
    91 850 Panzer
    Will try that next. You must have told that to Rob today.
    Yup, had a text and voice long distance diagnostics! 8-)
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  19. #19
    Join Date
    May 2015
    Location
    Miami, fl
    Posts
    21
    My Cars
    1995 Bmw 840ci
    Just saw your thread and was wondering if the crank sensor and cam sensor is from the dealer?

  20. #20
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's
    Quote Originally Posted by Pailicool View Post
    Just saw your thread and was wondering if the crank sensor and cam sensor is from the dealer?
    I bought them awhile ago but i'm pretty sure they were from Gault so they would be oem

    my Twins 850's and its AMG cousin

  21. #21
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,142
    My Cars
    koenig ks8 /e31 850c
    Quote Originally Posted by Pailicool View Post
    Just saw your thread and was wondering if the crank sensor and cam sensor is from the dealer?
    CPC Oem stealers
    MAGNECOR leads
    MSD coils

  22. #22
    Join Date
    Jun 2014
    Location
    Blue Springs MO
    Posts
    694
    My Cars
    M70 6sp. 540iT, 535is
    I didn't understand if you had a spark or not.. If you don't, check your clearance between harmonic balanced and crank sensors..

    - - - Updated - - -

    Do you have access to a code reader? It might give you and us some more clues lol

  23. #23
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    529
    My Cars
    Twin BMW e31's
    Quote Originally Posted by bmw528e11 View Post
    I didn't understand if you had a spark or not.. If you don't, check your clearance between harmonic balanced and crank sensors..

    - - - Updated - - -

    Do you have access to a code reader? It might give you and us some more clues lol
    I do have spark. I've had it hooked up to the laptop as well with nothing out of the ordinary. It was throwing an o2 sensor code but i had that before this issue. i cleared it an it hasnt come back. This is why we are stumped but I'll see what happens after i check what Tom mentioned.

    my Twins 850's and its AMG cousin

  24. #24
    Join Date
    Jun 2014
    Location
    Blue Springs MO
    Posts
    694
    My Cars
    M70 6sp. 540iT, 535is
    Do you know what is the fuel pressure you have at the rails?

  25. #25
    Join Date
    Oct 2008
    Location
    liverpool uk
    Posts
    2,142
    My Cars
    koenig ks8 /e31 850c
    My OEM CPS leads will not reach to the blue box
    Quote Originally Posted by rogbmw View Post
    Here is a picture of the wiring routing.

    Engine Front.jpg
    - - - Updated - - -
    Last edited by koenig d; 04-07-2016 at 12:49 PM.

Page 1 of 4 1234 LastLast

Similar Threads

  1. Calling on all wheel fitment Gurus
    By E21TRON in forum 1975 - 1983 (E21)
    Replies: 19
    Last Post: 11-11-2011, 02:04 PM
  2. roll call: calling out all 5-series guys
    By BADASS_R6 in forum BMW Rides & Events
    Replies: 0
    Last Post: 09-13-2004, 01:56 AM
  3. sidemarkers on all the time
    By salvia.D in forum 1991 - 1999 (E36)
    Replies: 4
    Last Post: 05-25-2004, 04:58 PM
  4. Heated Mirrors ON all the time ???
    By SnowDriver in forum 1992 - 1999 M3 (E36)
    Replies: 6
    Last Post: 05-14-2003, 04:57 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
  •