Page 2 of 2 FirstFirst 12
Results 26 to 33 of 33

Thread: CEL on Just When Emissions Testing is Due

  1. #26
    Join Date
    Oct 2003
    Location
    Seattle
    Posts
    5,775
    My Cars
    99 M3
    For these I’d expect stock is good.


    Sent from my iPhone using Tapatalk

  2. #27
    Join Date
    Dec 2011
    Location
    Riga, Latvia
    Posts
    1,326
    My Cars
    2x 1997 BMW Z3 2.8
    Quote Originally Posted by 328 Power 04 View Post
    Your problem is a vacuum leak, and a separate problem with a fuel tank pressurization. Tank pressurization happens every few drive cycles. That one can be a leak at the tubing going to the purge valve, or maybe the gas cap.
    Just for the record - fuel tank pressurization issue can be caused by vacuum leak.

  3. #28
    Join Date
    Dec 2007
    Location
    Great Dismal Swamp
    Posts
    16,026
    My Cars
    E36/7 E36/8x2 E46 F25
    True for a M52. Not true for the M52TU and later. These cars use an electric pump to pressurize the tank, rather than the old system of using engine vacuum to depressurized the tank.


    /.randy

  4. #29
    Join Date
    May 2011
    Location
    Arlington, VA
    Posts
    274
    My Cars
    2000 Z3 Coupe, M Coupé
    Quote Originally Posted by bluptgm3 View Post
    For these I’d expect stock is good.
    I’m generally fine with stock parts, but I doubt BMW has a monopoly on the best vacuum line. That said, I also don’t know yet if there’s anything special about the lines and any connectors that might be part of the assembly.

    Time to talk to my parts guy.

  5. #30
    Join Date
    Dec 2007
    Location
    Great Dismal Swamp
    Posts
    16,026
    My Cars
    E36/7 E36/8x2 E46 F25
    Nothing special. I buy vacuum line by the reel. Line from the valve to the solenoid under #6 runner. Solenoid to the vacuum nipple farm on the back of the plenum. Multiple vacuum caps also in that farm, three if I remember. Replace them all, they rot too. Then the hose from the back of the ccv cyclone to the fuel press regulator.


    As much of a pita getting to these are, just be glad you don't have an e46. Those I pull the manifold to change hoses.

  6. #31
    Join Date
    May 2011
    Location
    Arlington, VA
    Posts
    274
    My Cars
    2000 Z3 Coupe, M Coupé
    Thanks for the tip. Think I’ll look into a spool of vacuum hose. Need to find the right diameter and material. Happy to pop for some silicone line if there’s a durability advantage. I’m not trying to bling up the engine bay (not that there’s anything wrong with that), but I’d spring for more expensive line if it was likely to last longer.

    Wonder if it’s worth redoing the PCV system now, too. Car has 68K on it, but it’s also about 19 years old.
    Last edited by Outrider; 11-08-2017 at 01:03 PM.

  7. #32
    Join Date
    Jan 2011
    Location
    Kent, Ohio
    Posts
    4,431
    My Cars
    1998 M Roadster
    Quote Originally Posted by Outrider View Post
    Wonder if it’s worth redoing the PCV system now, too. Car has 68K on it, but it’s also about 19 years old.
    Only if you break the brittle plastic hose while you are replacing vacuum lines--it's something of a PITA to do (not that some of the vacuum lines won't be too).

  8. #33
    Join Date
    May 2011
    Location
    Arlington, VA
    Posts
    274
    My Cars
    2000 Z3 Coupe, M Coupé
    Thread back from the dead. I’ll repost codes, but they won’t have changed much. 2000 Z3C 2.8 manual. Sat for a while with airbag codes and a distracted owner. Finally fixed the airbag. But I let the SAP issue languish, kept the car off the road, but maintained it in running condition. It’s time to get this one back as a full up round.

    Looking at Randy’s suggestions, I have three vacuum lines and, perhaps, a valve cover gasket as potential remedies. Given that my now 20 year old car has a lot of original rubber on the engine, what things should I consider doing at the same time?

    Thanks in advance!

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Just when fix list is almost cleared, Crack....
    By Mrlucas in forum 1995 - 2001 (E38)
    Replies: 3
    Last Post: 04-12-2017, 09:02 AM
  2. Water Condensing on floor when A/c is on
    By killerM3 in forum 1992 - 1999 M3 (E36)
    Replies: 11
    Last Post: 06-18-2010, 08:48 AM
  3. Aux fan not coming on, does when a/c is on
    By lisnowboarder in forum General BMW Mechanical Help sponsored by RM European Auto Parts
    Replies: 26
    Last Post: 05-29-2010, 12:08 AM
  4. Really Stupid Question: How do I know when oil change is due?
    By bicker in forum 2006 - 2012 (E90, E91, E92, E93)
    Replies: 14
    Last Post: 08-13-2008, 11:18 AM
  5. Is Your Fan Vent On Even When the Setting is Zero???
    By ADAM///M in forum 1996 - 2002 Z3 (E36/7, E36/8)
    Replies: 17
    Last Post: 09-27-2003, 02:05 PM

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
  •