Page 1 of 2 12 LastLast
Results 1 to 10 of 20

Thread: I'll try this in here, anyone get too much timing pull with COS5?

  1. #1
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default I'll try this in here, anyone get too much timing pull with COS5?

    I set mine up and wired it all up and with the switch off i'm commanding 26 degrees timing and it gets what i'm commanding, then in the cos menu for the timing pull I have it set to pull 11 degrees and when I flip the switch it drops to 13.5 degrees instead of 15, so that's an extra 1.5 degrees pulled, I tried it with different numbers as well, 28 and pull 13 and it dropped to 13, so 2 degrees extra pulled. I went through the tune and changed every timing correction factor I could find to 0 (in case something else was causing the extra timing pull, but didn't think it was, because it wasn't pulling the extra on the motor with the switch off) and still the same shit. Anyone else have this problem? Anyone have any idea how to fix it? I'm pretty stumped, because it's working, it's just not pulling what i'm asking it too and is pulling too much, could there be a glitch in the program or something, I would really like to be able to use this so I don't always have to switch tunes between motor and spray, but if I can't get it to work right I guess i'll have to go back to just swapping tunes. Any help is very greatly appreciated and I can put up the tune and logs and everything if it would help, thanks guys!
    - Devon

    White '99 Z28

    9.09 @ 150

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Devon,

    I don't know where the extra 1.5 degrees pulled are coming from...

    Maybe try logging the EST_ pids (Electronic Spark Timing), they may show any active source of timing modification.

    Some coincidental condition may be triggering when the switch is active.

  3. #3
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default

    Quote Originally Posted by joecar View Post
    Devon,

    I don't know where the extra 1.5 degrees pulled are coming from...

    Maybe try logging the EST_ pids (Electronic Spark Timing), they may show any active source of timing modification.

    Some coincidental condition may be triggering when the switch is active.
    Alright, thanks man, i'll take a look into that. What exact pids would you recommend logging, and what am I looking for exactly, if I had zero'd out all the timing correction factors, what is left that could pull the extra? Would it make it easier if I put the tune and log files up? I could do it tomorrow when I get home from work, I forgot my laptop at my fiancees place tonight or I would do it now.
    - Devon

    White '99 Z28

    9.09 @ 150

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    You would just pick a few EST_ pids and log those, see if any account for the 1.5 degrees...

    if not, pick another few, repeat.

    Check also that your ECT and IAT are steady... if they "jump" at the same time as the swithc then some temperature modifier table may be kicking in... I'm just thinking out loud (TOL) here.

  5. #5
    Lifetime Member 5.7ute's Avatar
    Join Date
    Oct 2006
    Posts
    1,840

    Default

    Devon, I just had a look at one of my logs & I am seeing something similar. I will do a static test tonight to verify it & let you know.
    The Tremor at AIR

  6. #6
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,332

    Default

    Hmmm, I have used it COS5 a ton and haven't run into this that I know of. I ususally test all the cars by having it pull 10 so its easy to see. Is it doing it through the whole rpm range?

  7. #7
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default

    Quote Originally Posted by minytrker View Post
    Hmmm, I have used it COS5 a ton and haven't run into this that I know of. I ususally test all the cars by having it pull 10 so its easy to see. Is it doing it through the whole rpm range?
    Yes, it's doing it through the entire rpm range, I will put up the log and the tune, don't mind the a/f, I need to retune, it is off from some recent changes i've made, also, you'll see in the tune that I had set all the timing correction factors I could find to 0 throughout the entire table and it still is acting like this.

    BTW, may want to filter for 90% plus (even though i'm at wot, the tps only registers between 90 - 94 on my accufab tb for some reason), it's a long log, logged on the way to work for auto tuning and did the wot pulls during it, you'll see it hits 26 when the switch is off and the second pull is 13.5 with the switch on, only did short pulls and short shifted around 6500 just to get the data, I normally shift @ 7300.
    Attached Files Attached Files
    - Devon

    White '99 Z28

    9.09 @ 150

  8. #8
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default

    Quote Originally Posted by 5.7ute View Post
    Devon, I just had a look at one of my logs & I am seeing something similar. I will do a static test tonight to verify it & let you know.
    Thanks man!
    - Devon

    White '99 Z28

    9.09 @ 150

  9. #9
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default

    Quote Originally Posted by joecar View Post
    You would just pick a few EST_ pids and log those, see if any account for the 1.5 degrees...

    if not, pick another few, repeat.

    Check also that your ECT and IAT are steady... if they "jump" at the same time as the swithc then some temperature modifier table may be kicking in... I'm just thinking out loud (TOL) here.
    IAT can't jump, it's constant @ 72 degrees from a resistor, I had nowhere to put it with my intake/tb/air cleaner setup:

    (Don't have the air cleaner on in this pic, just a cover over the throttle body so nothing falls in, but you can get the idea)

    - Devon

    White '99 Z28

    9.09 @ 150

  10. #10
    Senior Member
    Join Date
    Dec 2006
    Posts
    145

    Default

    I'm wondering, has there been any kind of updates or changes to the cos5 file, maybe I got one that has a glitch, I downloaded it a while ago, is that possible?
    - Devon

    White '99 Z28

    9.09 @ 150

Page 1 of 2 12 LastLast

Similar Threads

  1. Displacement not on pull down
    By dennisscars in forum IL6,IL5,IL4 Atlas Engines - P12 PCM
    Replies: 13
    Last Post: May 24th, 2009, 12:15 PM
  2. Help, why can't I pull timing through my AIT?
    By 860 in forum Forced Induction and Nitrous Oxide (N20)
    Replies: 3
    Last Post: June 6th, 2008, 10:32 AM
  3. Can't pull LS7 SMS and O2 data
    By leres in forum E37, E38 & E67 PFI ECM's
    Replies: 7
    Last Post: July 27th, 2007, 09:41 PM
  4. Pull timing with bidirectional controls to test for KR?
    By Xtnct00WS6 in forum General (Petrol, Gas, Ethanol)
    Replies: 13
    Last Post: August 27th, 2006, 03:11 PM
  5. What else could pull timing?
    By QUICKSILVER2002 in forum General (Petrol, Gas, Ethanol)
    Replies: 5
    Last Post: January 1st, 2006, 10:24 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
  •