Page 3 of 5 FirstFirst 12345 LastLast
Results 21 to 30 of 45

Thread: Need some help with fuel trims.

  1. #21
    Junior Member
    Join Date
    Aug 2011
    Posts
    32

    Default

    hmmmmmm followed you seems like a no go hmmmm

  2. #22
    Senior Member johnmaster's Avatar
    Join Date
    May 2011
    Posts
    137

    Default

    still zeroes? Please look at the info screen and see that it "took" your engine selection. Changing units over is the best way to avoid this hassle. I believe Joecar told me how in a thread called something like "Pcm in dead poll cos5 upgrade". let me know what you come up with. Need to have the log open in the scan tool, select the engine, save the log, close the tool reopen the log in the scan tool, and it "should" work.

  3. #23
    Junior Member
    Join Date
    Aug 2011
    Posts
    32

    Default

    it took the engine dis. but it still shows zero when i try to see what average cells are, before a clivk on thattab I have a bunch of numbers but nothinn i can use.

  4. #24
    Senior Member johnmaster's Avatar
    Join Date
    May 2011
    Posts
    137

    Default

    What tab? Are the numbers that you can't use the cell counts?

    Do yourself the favor of switching units from % to G*K/kPa in your logging and your tune tool VE table, it will eliminate all of these zero value headaches and make your ve table work easier. I did and am not going back. Look up that thread I mentioned and see if that helps.

  5. #25
    Junior Member
    Join Date
    Aug 2011
    Posts
    32

    Default

    i dont like dealing with percentage im more used to kpa anyways so the are that way but the cells under vet table when changed to average goes to zero

  6. #26
    Senior Member johnmaster's Avatar
    Join Date
    May 2011
    Posts
    137

    Default

    Good if you have them set to kpa and are used to it, will make life easier. Your scan tool/log might be set up for % though from the sounds of it, at least that was the problem I ran into when I had this problem myself. Perhaps try to make a quick log idling to test it out again, not sure what else to suggest. Make sure the map is displaying ve g*K/Kpa and that your pids are all valid. Perhaps post your log file for others to view.

  7. #27
    Junior Member
    Join Date
    Aug 2011
    Posts
    32

    Default

    Here is my last log file any input will help?
    Attached Files Attached Files

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

    Default

    Your DYNAIRTMP pid is invalid, and so it is always zero, causing the CALC.VET calculation to be zero always... you need a different way of figuring DAT, see the 1998 section of the Calc.VET Tutorial.

    Post a screenshot.

    Also, you have to reduce the pid channel count to 24 or less (otherwise your data is not sampled frequently enough), you can drop the pid MAFFREQ2.

  9. #29
    Junior Member
    Join Date
    Aug 2011
    Posts
    32

    Default

    how do you do a screenshot?

  10. #30
    Senior Member johnmaster's Avatar
    Join Date
    May 2011
    Posts
    137

    Default

    You should have a print screen key on your key board, mine is right next to f12. Hit the print screen button, nothing will happen. Open programs>accessories>paint. Do a Ctrl+V to paste the saved image into the paint program. Save the file and put it up here for us to see. To validate a pid that isn't working, right click it and check out info, it will usually tell you what other pid needs to be active in order to get it to work.

    On the pids list the channel count is at the bottom of the screen.

Page 3 of 5 FirstFirst 12345 LastLast

Similar Threads

  1. Tuning with fuel trims
    By 68problemchild in forum Gen IV V8 Specific
    Replies: 63
    Last Post: July 30th, 2011, 08:43 PM
  2. Why negative fuel trims after autoVE
    By Gelf VXR in forum General (Petrol, Gas, Ethanol)
    Replies: 14
    Last Post: July 16th, 2010, 11:14 PM
  3. E38 fuel trims
    By minytrker in forum Gen IV V8 Specific
    Replies: 15
    Last Post: July 2nd, 2010, 02:44 PM
  4. HELP fuel trims and AFR all over the place?
    By warscout2 in forum Gen III V8 Specific
    Replies: 1
    Last Post: January 30th, 2008, 11:31 PM
  5. Fuel Trims are 0
    By Rhino79 in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: January 17th, 2007, 04:15 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
  •