Results 1 to 10 of 10

Thread: VE Tuning... not going well.....input needed.

  1. 04-21-2010 #1
    bluebyu8484
    bluebyu8484 is offline
    Tuner
    Join Date
    Apr 2010
    Posts
    58

    VE Tuning... not going well.....input needed.

    Trying to tweak the VE table per instructions:

    Diable MAF,DFCO, and PE interference
    Configure VE - LTFT histogram w/ cell hits req'd at 5
    Re-set LTFT's
    Scan for cells at idle, 2000-4000rpm varying and constant loads
    Copy/Paste Special % Multiply in to VE table


    ....have done this and by the 5th round I noticed the histogram cells in the .08-.12 & 3000-4000 rpm area were not improving closer to zero....10-15 everytime, which was forcing my VE table very high in the 4800-6000 rpm & 20-35 kPa. The last numbers I was showing ranged in the VE table in the 125-140's. What the heck... I changed them before and I got pretty close, but read that re-seting the LTFT's each time was needed...which i did this time and wanted to tweak the tables a bit and not the case. Any experience with this and direction would be awesome. Thanks
    Reply With Quote Reply With Quote
  2. 04-21-2010 #2
    Mart00ss
    Mart00ss is offline
    Tuner
    Join Date
    Aug 2009
    Posts
    51
    You disabled PE????? Thats dangerous man.
    Try this guide here.
    http://ls1tuningguide.com/tuninghelpfiles.php
    Reply With Quote Reply With Quote
  3. 04-21-2010 #3
    EC_Tune
    EC_Tune is offline
    Супер Модератор EC_Tune's Avatar
    Join Date
    Apr 2003
    Location
    Almost 2000 feet.
    Posts
    7,876
    Check fuel pressure under load. The only time I've seen ridiculous VE values is when the pump isn't keeping up.
    Always Support Our Troops!
    Reply With Quote Reply With Quote
  4. 04-21-2010 #4
    bluebyu8484
    bluebyu8484 is offline
    Tuner
    Join Date
    Apr 2010
    Posts
    58
    How do I check the fuel pressure under load?
    Reply With Quote Reply With Quote
  5. 04-21-2010 #5
    346ci
    346ci is offline
    Tuner in Training 346ci's Avatar
    Join Date
    Aug 2008
    Posts
    37
    hook up a fuel gauge and tape it to your windshield then go for a drive
    Reply With Quote Reply With Quote
  6. 04-22-2010 #6
    CLRD4TO
    CLRD4TO is offline
    Tuner CLRD4TO's Avatar
    Join Date
    Apr 2010
    Location
    Twin Cities, MN
    Posts
    61
    Paste special>multiply % -half
    99 Hugger Camaro LS1 M6 TSP Torquer V2 cam, 100 dry-shot N2O, 42# "green tops", lid, p&p MAF/TB, LS6 Intake, Hooker LT's, Custom ORY with Flowmaster Merge, DMH cutout, Magnaflow CB, tuned with LC-1 and '02 OS.
    Reply With Quote Reply With Quote
  7. 04-22-2010 #7
    bluebyu8484
    bluebyu8484 is offline
    Tuner
    Join Date
    Apr 2010
    Posts
    58
    The hose and guage I guess at most auto parts stores?
    Reply With Quote Reply With Quote
  8. 04-22-2010 #8
    nikon1999
    nikon1999 is offline
    Tuner
    Join Date
    Dec 2006
    Posts
    74
    Silly question. But what year is the car your working on? Perhaps I missed it. But if it's 98-99 make sure your using the secondary ve table unless you've installed a new os
    Reply With Quote Reply With Quote
  9. 04-22-2010 #9
    transam_151
    transam_151 is offline
    Tuner in Training
    Join Date
    Jan 2010
    Posts
    47
    i also had this problem with a 02 os would get pretty close then go out of whack. make sure you reset fuel trims each time you do a scan. also i have found that plus/minus 10 start doing paste special multiply by % half make take several extra time then they will work out. ALSO accorinding to my book you max out pe enrichment table but dont do a wide open throttle pass on it buddy i hope this helps you good luck
    Reply With Quote Reply With Quote
  10. 04-22-2010 #10
    bluebyu8484
    bluebyu8484 is offline
    Tuner
    Join Date
    Apr 2010
    Posts
    58
    No WOT during this calibration... it is a '99... I guess I need to copy paste corrections by row into the secondary table also?
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »