Page 1 of 4 123 ... LastLast
Results 1 to 10 of 38

Thread: Can HP Tuners Read COS Tunes From EFILive?

  1. #1
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    659

    Default Can HP Tuners Read COS Tunes From EFILive?

    My friend has HPT and we tried pulling the tune on my dually to get a look at the 4lo stuff. Hunting for a spot with the camper, I actually have a use for 4lo but with the COS the way it is I'd have to wind it out to get the thing to shift out of 1st. Seeing how HPT can alter this stuff, I'm wanting to get this fixed as I know another guy with their version of a stream license who will hook me up. We were unable to get my tune pulled, it always failed at the halfway point. There was something it definitely didn't like. We then proceeded to warm over the stock tune on said friend's 2005 GMC 2500HD 6.0/4L80 and I can say with absolute certainty that those trucks are far more finicky than mine when it comes to reading and flashing. That said, since updating my software/firmware my EFILive has been an absolute peach with those era trucks. If I were to get HPT to read, would a flash mess up my COS stuff? Would I need to full flash un-COS, alter that stuff with a cal only flash, re-COS, then dump my current cal only tune back on to make it work? I was gonna monkey with the throttle lift TCC unlock stuff inherent to the 4L80 as well.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  2. #2
    Forum tyhee Site Admin GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,109

    Default

    HPT can probably read the PCM still, can they edit the file though? I'm going to say I hope not because we haven't given them permission to be able to use our COS's in their software.
    The PCM having an EFILive COS should not have made any difference to the PCM failing to read part way through.


  3. #3
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    659

    Default

    So sounds like I'd need to start with my base tune, cal flash that with HPT, COS it, then copy/paste my trans stuff because I suspect a segment swap would wipe it back out.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  4. #4
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,328

    Default

    It depends on the COS, years ago a COS wold lock out the other software but I have read out a efi cos with hpt to edit some tables efi didnt have have.

  5. #5
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    659

    Default

    I forget which OS is the base OS on my dually, it's not the popular 12212156 like my 1500 is. It's COS3 though on an LS1B PCM and my goal is the same, TCC release settings and 4lo shift tables that aren't accessible in EFILive.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  6. #6
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,328

    Default

    12212156 was the original OS on the COS5 I read out with hpt.

  7. #7
    Lifetime Member ProperTuningOG's Avatar
    Join Date
    Dec 2014
    Posts
    230

    Default

    Yes you can edit a COS with HP. Heres a file.

    COS HP.zip

  8. #8
    Forum tyhee Site Admin GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,109

    Default

    So this file is an EFILive COS that you can edit / flash with HPT?


  9. #9
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    659

    Default

    Quote Originally Posted by GMPX View Post
    So this file is an EFILive COS that you can edit / flash with HPT?
    Is the stuff in the EFILive Custom Calibrations stuff in its own segment like engine, engine diag, trans, etc?
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  10. #10
    Lifetime Member ProperTuningOG's Avatar
    Join Date
    Dec 2014
    Posts
    230

    Default

    Quote Originally Posted by GMPX View Post
    So this file is an EFILive COS that you can edit / flash with HPT?

    Yes, I flashed the ECM with EFILive COS and a setup file. Then read, emailed and remotely tuned with HPT since thats what the customer had.

Page 1 of 4 123 ... LastLast

Similar Threads

  1. Any EFILive tuners near central florida?
    By JonZ71 in forum General
    Replies: 5
    Last Post: January 15th, 2013, 04:59 PM
  2. Reading tunes written with other tuners?
    By Bryce418 in forum Gen III V8 Specific
    Replies: 2
    Last Post: March 13th, 2012, 12:24 PM
  3. Calling EFILive Professional Tuners
    By Blacky in forum Lounge
    Replies: 0
    Last Post: April 20th, 2007, 03:22 PM
  4. Can I read an HP tuners custom OS?
    By TLKSCHP in forum General (Petrol, Gas, Ethanol)
    Replies: 11
    Last Post: November 6th, 2006, 05:05 AM
  5. Can Flashscan read HP Tuners?
    By jsttry in forum General (Petrol, Gas, Ethanol)
    Replies: 11
    Last Post: March 10th, 2006, 12:27 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
  •