Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: Can't increase timing while brake stalling (tune and log attached)

  1. #1
    Senior Member thunder550's Avatar
    Join Date
    Mar 2006
    Posts
    178

    Default Can't increase timing while brake stalling (tune and log attached)

    I'm trying to bump up my timing while brake stalling. I'm commanding 30 degrees at .64 g/cyl and 2400 RPM in both my high and low octane spark tables, but my base spark PID and timing advance PID are both only showing 25 degrees. It doesn't seem to matter what I command at that point (.64/2400), I always get right around 25*. Can someone take a look at my log and tune and see if you can figure out what's up?

    The log file is long - take a look right around frame 2640, that's where I stalled it up.
    Attached Files Attached Files

  2. #2
    Lifetime Member 5.7ute's Avatar
    Join Date
    Oct 2006
    Posts
    1,840

    Default

    I am only new to this so I could be way wrong. One thing I noticed in your tune is that brake stalling will cause you to go into abuse mode from tables D2001,D2002 & D2003.
    Brake torque management is off so that shouldnt be the issue.
    Why dont you do a log with some of the other spark pids selected. This will pinpoint which parameter is removing the spark.

  3. #3
    Senior Member thunder550's Avatar
    Join Date
    Mar 2006
    Posts
    178

    Default

    I did some logging with all the spark PIDs selected and nothing was showing any timing being pulled. I'll check out the abuse mode thing, I thought I found all the places to turn it off but apparently I missed some. Thanks for the reply

  4. #4
    Senior Member thunder550's Avatar
    Join Date
    Mar 2006
    Posts
    178

    Default

    Well that didn't fix it :(

  5. #5
    Lifetime Member
    Join Date
    Apr 2003
    Posts
    379

    Default

    Have a look at your B5932 , as you have no speed input yet the spark is still in Base spark.

    I havent looked at your tune but that is generally what I would be looking at as the vehicle will be using this table until the speed and tps values are met.

  6. #6
    Lifetime Member 5.7ute's Avatar
    Join Date
    Oct 2006
    Posts
    1,840

    Default

    His base spark table commands 35deg at this point so that isnt the issue.

  7. #7
    EFILive Reseller kbracing96's Avatar
    Join Date
    Sep 2005
    Posts
    584

    Default

    Chris, can you use the bi-direction controls to add timing there?
    01 ECSB 1/2 ton 4x4 Forged 5.7 LS1 GMC

    Custom KBracing front mounted, BW S480, intercooled turbo


  8. #8
    Senior Member thunder550's Avatar
    Join Date
    Mar 2006
    Posts
    178

    Default

    I tried and the log didn't show any increase.

  9. #9
    Lifetime Member
    Join Date
    Aug 2005
    Posts
    710

    Default

    Perhaps this is a case of the hidden "run-launch spark modifier" table kicking in that Jesse has mentioned in the past...

  10. #10
    Lifetime Member
    Join Date
    Jan 2004
    Posts
    232

    Default

    Could it be Burst knock retard(B6212). It is programmed to take 6 degrees of timing out at 2400rpm if it kicks in from a sudden change in cylinder air mass and it looks like you're getting right around 6 degrees taken out.

Page 1 of 2 12 LastLast

Similar Threads

  1. Where is all my timing going??? Log attached
    By exploder in forum General (Petrol, Gas, Ethanol)
    Replies: 34
    Last Post: May 24th, 2010, 04:55 AM
  2. Sudden increase in Air/Cyl
    By Mileage in forum E37, E38 & E67 PFI ECM's
    Replies: 35
    Last Post: June 9th, 2009, 10:09 AM
  3. help with p0101 code, tune file attached
    By adam1803 in forum Gen III V8 Specific
    Replies: 2
    Last Post: May 25th, 2009, 11:05 AM
  4. BIG Auto VE problem - Tune files attached
    By Kevin Doe in forum General (Petrol, Gas, Ethanol)
    Replies: 15
    Last Post: October 14th, 2007, 01:57 PM
  5. "Service Brake System" message after tune change
    By mtnman in forum General (Petrol, Gas, Ethanol)
    Replies: 0
    Last Post: September 11th, 2005, 01:26 AM

Posting Permissions

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