Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 35

Thread: E38 no start issue

  1. #21
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    ( I'm viewing this via my phone )

    F9 would be the Data tab in the V7 scantool, correct...?

    And you're viewing the states/flags of the pid GM.VTD...

    IIRC, there are some no-start reason flags in some of the pids GM.STATExx, these may or may not be helpful.

    ( I can look in the scantool when I get home to my PC )
    Last edited by joecar; January 4th, 2016 at 06:12 AM.

  2. #22
    Lifetime Member
    Join Date
    Aug 2010
    Posts
    1,934

    Default

    From memory, if you are logging GM.VTD .... then VTD-VTD1 (Vehicle Theft Deterrent Fuel Control) will be "No" if VATS is active, and will be "Yes" if VATS has been disabled (patched).

  3. #23
    Member
    Join Date
    Sep 2010
    Posts
    74

    Default

    Update, Hey Taz, the VTD appears to be the other way around..... I'm 50% certain of that..... hehe
    The good news for me is, I have it running, but to do so I jury rigged another VZ style custom manual harness I have made for a customers Patrol, and used the same service #12633238 2010 model E38 with OS 12639270 and did all the mods required, vats patch, full flash etc and as soon as I checked the VTD-VTD1 it read no, which was kinda exciting, and as soon as I hit the key it fired up spluttered a bit, then lost injectors, and came up with P0690 from memory and the VTD1 also changed to yes.
    I masked the engine relay code, and flashed that back in, and it now runs good enough for now, with VTD1 remaining on NO.....
    I reckon I tried every combo and applicable mask I could find and could not get a murmur or VTD1 NO out of the 2014 OS 12656930.
    I havent given up yet on the VF setup, and will work systematically through it and do process of elimination, but the big question is...
    Has anyone done the OS conversion yet successfully in a vehicle and not on the bench????
    Or is it just easier to use the (tried and proven) VE OS's....
    I'm a bit concerned with the VF trans calibration matching the earlier VE OS, even though both are serv# '238's..... any clues???
    Thanks for all your replies, and I hope what I'm writing is helpful to all.

  4. #24
    Lifetime Member
    Join Date
    Dec 2007
    Posts
    1,143

    Default

    Apologies if I wasn't clear in an earlier post - the 12656930 OS was VATS patched and run in our test vehicle in the road with an A6 trans & E85. Can't drive a bench. . Only DTC's were a new O2 sensor code - to do with response rate of the O2 sensors, and the P0615 Start Relay test.

  5. #25
    Member
    Join Date
    Sep 2010
    Posts
    74

    Default

    Thanks gmh308, I will persevere......

  6. #26
    Member
    Join Date
    Sep 2010
    Posts
    74

    Default

    Update... problem solved.
    After much stuffing around using a 2nd harness and then pinning (almost) everything out, and then doing process of elimination, it turned out to be a broken wire in the cam sensor lead. The crashed donor car took a hit on the front left, and although it didn't cut the harness, it busted the earth wire in the crash.
    This was my bad, as I know that these engines will run with the cam sensor unplugged, so I "assumed" this sensor wouldn't be a problem..... wrong.... it will run with 3 wires unplugged but not just 1.... and this is enough to cut fuel and spark....
    Thanks for the help guys, much appreciated
    I have it all finished and running very nice now
    Next step is to get the VF Body Control module to run the TUTD, has anyone done this yet??? and/or got the pinouts from BCM to use.
    Or is it just easier to use the VE BCM

  7. #27
    Lifetime Member
    Join Date
    Dec 2007
    Posts
    1,143

    Default

    No CAM DTC Hooter?

  8. #28
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Thanks for reporting back your finding.

  9. #29
    Member
    Join Date
    Sep 2010
    Posts
    74

    Default

    No cam code at all gmh308, also it was the signal ground wire.

  10. #30
    Lifetime Member
    Join Date
    Dec 2007
    Posts
    1,143

    Default

    Weird. Normally if ECM sees no CAM with Crank, DTC pops up. Echoing Joecar, thanks for reporting back your finding. Great to know!

Page 3 of 4 FirstFirst 1234 LastLast

Similar Threads

  1. Start/Post start issue!
    By IJ. in forum Gen IV V8 Specific
    Replies: 3
    Last Post: September 3rd, 2013, 01:55 PM
  2. Cammed VE L98 after start enrichment issue
    By The Alchemist in forum E37, E38 & E67 PFI ECM's
    Replies: 10
    Last Post: June 12th, 2012, 07:02 PM
  3. E40 Cam Cold Start issue........help please!!
    By quik95lt1 in forum Gen IV V8 Specific
    Replies: 12
    Last Post: December 19th, 2011, 02:31 AM
  4. LS7 Hot Start Issue
    By hapnermw in forum E37, E38 & E67 PFI ECM's
    Replies: 8
    Last Post: August 20th, 2009, 04:24 PM
  5. warm start issue
    By thomas walters in forum Gen IV V8 Specific
    Replies: 0
    Last Post: October 16th, 2007, 05:40 PM

Posting Permissions

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