Page 3 of 4 FirstFirst 1234 LastLast
Results 51 to 75 of 97

Thread: i call on all the 8 series gurus

  1. #51
    Join Date
    Feb 2016
    Location
    Norwalk, CT
    Posts
    277
    My Cars
    1995 840Ci, 2013 X5
    Is there an adaptive throttle reset procedure for that car?

    Brett

  2. #52
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    Quote Originally Posted by liquidblueloft View Post
    Did that yesterday at the shop. Both were within a proper lbs of pressure
    What was the pressure at idle vs higher rpm?

    Sent from my SM-G925T using Tapatalk

  3. #53
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    One line was 56lbs and the other was 59

    my Twins 850's and its AMG cousin

  4. #54
    Join Date
    Apr 2008
    Location
    Wiesbaden, Germany
    Posts
    23
    My Cars
    840Ci, 540i (E34)
    You wrote that you checked the connections to the Batteries.
    Did you also checked the two flat fuses in the main plus cables? (Fusible Links)
    Many owners had all sorts of strange problems due to fine cracks in those Fuses.
    Here is a Link regarding this Problem.
    Hope it helps. Good Luck.

    Cheers
    Steve

  5. #55
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by thinman View Post
    You wrote that you checked the connections to the Batteries.
    Did you also checked the two flat fuses in the main plus cables? (Fusible Links)
    Many owners had all sorts of strange problems due to fine cracks in those Fuses.
    Here is a Link regarding this Problem.
    Hope it helps. Good Luck.

    Cheers
    Steve
    We did replace them both.

    my Twins 850's and its AMG cousin

  6. #56
    Join Date
    Apr 2008
    Location
    Wiesbaden, Germany
    Posts
    23
    My Cars
    840Ci, 540i (E34)
    Air leakages? Deteriorated rubber pipes or crack on the VCV valve?
    (Sorry if I suggest something, which is already checked.)
    I only know the V8s. Can the M70 be checked with INPA to show uneven cylinder running?
    That helps a lot with the V8 to pinpoint which cylinder acts up.

  7. #57
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    Quote Originally Posted by liquidblueloft View Post
    One line was 56lbs and the other was 59
    I don't understand 56 LBS? Do you mean 56 PSI?? If so it's way to high and you FPRs are shot

  8. #58
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by dragon850 View Post
    I don't understand 56 LBS? Do you mean 56 PSI?? If so it's way to high and you FPRs are shot
    oops ya .. psi. maybe thats my problem. i thought that was normal going in the rails. it was low 40's going out of the regulators. i'll go swap those right now with the good car. thanks
    Last edited by liquidblueloft; 08-17-2017 at 01:28 PM.

    my Twins 850's and its AMG cousin

  9. #59
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by thinman View Post
    Air leakages? Deteriorated rubber pipes or crack on the VCV valve?
    (Sorry if I suggest something, which is already checked.)
    I only know the V8s. Can the M70 be checked with INPA to show uneven cylinder running?
    That helps a lot with the V8 to pinpoint which cylinder acts up.
    I haven't but I'll check. thanks for the suggestion

    my Twins 850's and its AMG cousin

  10. #60
    Join Date
    Jul 2009
    Location
    Del Mar, CA
    Posts
    742
    My Cars
    91 850i, 01 740i, 06 760
    Quote Originally Posted by liquidblueloft View Post
    oops ya .. psi. maybe thats my problem. i thought that was normal going in the rails. it was low 40's going out of the regulators. i'll go swap those right now with the good car. thanks
    That does not sound right. Coming out of the FPR's is going straight back to the fuel tank, there should not be much pressure in that line unless you have a blockage which might explain why your pressure going into the fuel rails is higher than normal (~ 37psi at idle and 42 at wot).

  11. #61
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    I swapped the regulators and little or no difference. frustrating.

    my Twins 850's and its AMG cousin

  12. #62
    Join Date
    Jul 2009
    Location
    Del Mar, CA
    Posts
    742
    My Cars
    91 850i, 01 740i, 06 760
    If you are measuring 56psi fuel pressure at the hoses feeding fuel rails something is wrong. It should be about 37psi when idling. You should be able to blow into the return hose (feeds into the gas tank) with little resistance. Without the vacum lines attached to the FPR's the fuel pressure should increase to about 43psi (intake vacuum lowers the fuel pressure).

  13. #63
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    sorry i got that wrong... my buddy corrected me last night. "37 and 39". Don't ask me where i got the fifty from. To be honest i'm going in circles on this car and i'm starting to forget what I've done already. My mistakes are starting to cause me more work.
    okay so i swapped the fuel pump and regulators. also checked the fuel rails and checked all the injectors. Nothing has changed. I'm still thinking it has something to do with electrical/spark. The more i drive it around the city the more i am noticing a gas smell on occasion. Not all the time but just a bit. Its almost like its not all burning off.
    Also, Has anyone had their petentiometer need replacing? What are the symptoms when is goes?
    Last edited by liquidblueloft; 08-19-2017 at 03:23 PM.

    my Twins 850's and its AMG cousin

  14. #64
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    so this afternoon I checked all the gaps on the spark plugs and reinstalled everything. Still no improvement. I took it for another run and It definitely feels like I'm flooding the engine. I'm determined to figure this out. Here is some video too



    Last edited by liquidblueloft; 08-19-2017 at 08:23 PM.

    my Twins 850's and its AMG cousin

  15. #65
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    Is your idle going up and down on its own or you are revving it?

    Sent from my SM-G925T using Tapatalk

  16. #66
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by dragon850 View Post
    Is your idle going up and down on its own or you are revving it?

    Sent from my SM-G925T using Tapatalk
    I was revving it. It back fired too. The second is foot to the floor but it feels like I have an extra 2 tonnes of weight in the car.
    Last edited by liquidblueloft; 08-19-2017 at 11:09 PM.

    my Twins 850's and its AMG cousin

  17. #67
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    It seems you are running on 6 possibly

    Sent from my SM-G925T using Tapatalk

  18. #68
    Join Date
    Aug 2016
    Location
    Mclean, VA
    Posts
    306
    My Cars
    1992 850i, 2015 M5
    Didn't see that you the crank position sensors? Any transfail error codes?

    Sent from my SM-G950U using Tapatalk

  19. #69
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by dragon850 View Post
    It seems you are running on 6 possibly

    Sent from my SM-G925T using Tapatalk
    Ya but there are no codes being thrown and no cel. I'm at a loss.

    - - - Updated - - -

    Quote Originally Posted by nrp22101 View Post
    Didn't see that you the crank position sensors? Any transfail error codes?

    Sent from my SM-G950U using Tapatalk
    I did... Twice. �� no transfail codes
    Last edited by liquidblueloft; 08-20-2017 at 01:57 AM.

    my Twins 850's and its AMG cousin

  20. #70
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    While laying in bed... I just had one of those lightbulb moments and it's not a good one. The reason I initially had to do all the work was because the shop I took the car to replace the water pump didn't clamp the coolant pipe that runs down the engine. Even after I printed out the post on this forum with the proper procedure. The pipe let go while I was driving home one evening and I had to tow the car home. That's when I ordered all the parts to fix it myself.

    Since the issue I'm having is power loss and it doesn't seem specific to a single side, I'm now wondering if I had engine damage from all the coolant leaking out. This is not the answer I want but it does seem possible now. I did notice yesterday that the #5 and #10 spark plug seemed really black and dirty compared to the rest and they have very little kms on them.

    Would this not throw any codes? Is a compression test my next step?
    Last edited by liquidblueloft; 08-20-2017 at 12:14 PM. Reason: Grammar

    my Twins 850's and its AMG cousin

  21. #71
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    I don't think thats, it. What diagnostics system are you using?
    I am still not convinced on the fuel system, you said you got brand new fuel assembly?
    If so why is the psi is different on one bank?

    Sent from my SM-G925T using Tapatalk

  22. #72
    Join Date
    Mar 2008
    Location
    Vancouver BC/Edmonton AB Canada
    Posts
    530
    My Cars
    Twin BMW e31's
    Quote Originally Posted by dragon850 View Post
    I don't think thats, it. What diagnostics system are you using?
    I am still not convinced on the fuel system, you said you got brand new fuel assembly?
    If so why is the psi is different on one bank?

    Sent from my SM-G925T using Tapatalk
    Gt1. The fuel pump was under 5000kms when I transferred it from the other car to this one. Also The car ran perfect until the coolant leak. I know with these cars anything could happen and it could be just coincidence so I still have my hopes for something else.

    Is a 2 psi difference that much? What would you suggest I do?

    I was considering rebuilding the old fuel pump with the method on a post here. I think it actually might have been yours too. I have access to a shop here so I still might just get the compression test done to rule it out before I start to dump anymore money into it.

    my Twins 850's and its AMG cousin

  23. #73
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    Quote Originally Posted by liquidblueloft View Post
    Gt1. The fuel pump was under 5000kms when I transferred it from the other car to this one. Also The car ran perfect until the coolant leak. I know with these cars anything could happen and it could be just coincidence so I still have my hopes for something else.

    Is a 2 psi difference that much? What would you suggest I do?

    I was considering rebuilding the old fuel pump with the method on a post here. I think it actually might have been yours too. I have access to a shop here so I still might just get the compression test done to rule it out before I start to dump anymore money into it.
    When you are saying fuel pump, keep in mind, there are 2 of them inside the assembly. Just think about this for a second, FPR is a mechanical device that regulates pressure, so if one side is registering at 2 PSI less than regulated pressure that means this is all that fuel pump is capable of putting out at idle not even talking about WOT. So you either have a weak pump, bad leak inside the carrier or clog in the filters.
    I suggest following my sticky thread to rebuild the pump carrier with new pumps, however now days I would actually suggest using Walbro pumps instead sold here: http://www.ebay.com/itm/Walbro-GSS34...53.m1438.l2649

  24. #74
    Join Date
    Jun 2008
    Location
    N/A
    Posts
    2,926
    My Cars
    TT Cayenne / SC 850
    Also can you connect the multi meter the fuses 23 and 24 and ground and tell me the voltage you are getting when the car is on?

  25. #75
    Join Date
    Sep 2008
    Location
    Santa Barbara
    Posts
    2,693
    My Cars
    91 Dinan860 & 91 850 6sp
    Quote Originally Posted by dragon850 View Post
    When you are saying fuel pump, keep in mind, there are 2 of them inside the assembly. Just think about this for a second, FPR is a mechanical device that regulates pressure, so if one side is registering at 2 PSI less than regulated pressure that means this is all that fuel pump is capable of putting out at idle not even talking about WOT. So you either have a weak pump, bad leak inside the carrier or clog in the filters.
    I suggest following my sticky thread to rebuild the pump carrier with new pumps, however now days I would actually suggest using Walbro pumps instead sold here: http://www.ebay.com/itm/Walbro-GSS34...53.m1438.l2649
    Buy a pair of these too... http://www.ebay.com/itm/WALBRO-GSS34...-/302152965801
    and use solder & shrink wrap!
    '91 Dinan 860 Stage III (new 6L engine)
    '91 Dinan 850 TT stage III (brand new engine)
    '91 850i 6sp (mint)
    '90 Dinan 750iL TT stage III
    '94 850 CSi (being restored to factory perfect)
    '96 850Ci, The George Carlin car
    '94 840ci (4 short - obvious parts car), '91 850i parts car
    '73 3.0 csi, '08 535i, '95 318i
    ...and a few other non BMW cars

Page 3 of 4 FirstFirst 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
  •