Close

Results 1 to 7 of 7
  1. #1
    Join Date
    Aug 2010
    Location
    Chicago
    Posts
    292
    Rep Points
    372.9
    Mentioned
    5 Post(s)
    Rep Power
    4


    Yes Reputation No

    Boostcut at high speeds

    I had a run today with a newer E55 amg and went from a 60-140mph pull. Seems that after that pull, the boost started staying around stock levels. No codes or anything showed up. It goes back to normal once I turn off the engine and turn it back on. This was done on map 5 and was hitting about 15psi of boost like usual in this cold weather. Has anyone ever had this problem or a solution?


    2007 E92 335i
    mods: JB4 15 ohm, BMS DCI, BMS downpipes.

  2. #2
    Join Date
    Feb 2012
    Location
    south florida
    Posts
    1,986
    Rep Points
    2,386.1
    Mentioned
    96 Post(s)
    Rep Power
    24


    Yes Reputation No
    you hit some sort of failsafe causing it to revert to stock boost

    what fuel are you using?

    You said no codes or anything showed up.... As in no CEL/SES in dash? or did you actually hook up the laptop and check codes?
    - Proven Power Tampa built 6466 ST -
    - N54 6AT WR 711whp 637wtq-
    -N54 WR 1/4mile trap: 133.57mph- -

  3. #3
    Join Date
    Nov 2009
    Location
    Simi Valley, CA
    Posts
    8,130
    Rep Points
    9,123.4
    Mentioned
    644 Post(s)
    Rep Power
    92


    Yes Reputation No
    Either a JB4 failsafe or if a G4 board a tuner code.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, N63s, S55s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

  4. #4
    Join Date
    Aug 2010
    Location
    Chicago
    Posts
    292
    Rep Points
    372.9
    Mentioned
    5 Post(s)
    Rep Power
    4



    Yes Reputation No
    Click here to enlarge Originally Posted by Ak335i Click here to enlarge
    you hit some sort of failsafe causing it to revert to stock boost

    what fuel are you using?

    You said no codes or anything showed up.... As in no CEL/SES in dash? or did you actually hook up the laptop and check codes?

    No CEL/SES and I also did the in dash code read. Was driving somewhere an hour from home so I didn't have my laptop. It seems to happen everytime I do pulls past 120mph. I don't really go those speeds very often, but I don't like the fact that there is something wrong when I do.

  5. #5
    Join Date
    Nov 2009
    Location
    Simi Valley, CA
    Posts
    8,130
    Rep Points
    9,123.4
    Mentioned
    644 Post(s)
    Rep Power
    92


    Yes Reputation No
    Turn auto clear off and see if anything gets stored next time. Tuner codes will normally be deleted automatically if auto clear is on. The G5 ISO ignores them. But the G4 listens to their request for less boost.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, N63s, S55s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

  6. #6
    Join Date
    Aug 2010
    Location
    Chicago
    Posts
    292
    Rep Points
    372.9
    Mentioned
    5 Post(s)
    Rep Power
    4



    Yes Reputation No
    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Turn auto clear off and see if anything gets stored next time. Tuner codes will normally be deleted automatically if auto clear is on. The G5 ISO ignores them. But the G4 listens to their request for less boost.
    Is this a marketing trick to get me to upgrade to a G5? LOL! I was already going to upgrade, but just waiting for spring time.

  7. #7
    Join Date
    Jun 2011
    Posts
    884
    Rep Points
    1,435.3
    Mentioned
    16 Post(s)
    Rep Power
    15


    Yes Reputation No
    Same thing happened to me when I ran my JB4 g4 15ohm map 5. Never got a CEL or anything when I would check for codes using the jb4 interface. I did get a code that would repeat like 10 times when I would check using my cobb ap: H2F6C. Not sure if thats a tuner code or not.

Tags for this Thread

Bookmarks

Posting Permissions

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