Become a ltxtech.com member, Click here to register!

Page 3 of 3 FirstFirst 123
Results 21 to 25 of 25
  1. #21
    LTX Member


    Status
    Offline
    Join Date
    Feb 2017
    Name
    scott
    Vehicle
    1997 ws6 trans am
    Location
    garden city ks
    Posts
    16

    Default

    if he could explain how to export the file i have no problem doing so. its only an idle log but i can drive it tomorrow as it was on jack stands for looking at connections. LT and ST fuel trims were stuck on 128 with a coolant temp of 168. B1 and B2 p/w-mw were 4.39 and 4.29...which would mean its dumping fuel to compensate for lean condition? ive checked for vac leaks and found none

  2. #22
    LTX Member


    Status
    Offline
    Join Date
    Feb 2017
    Name
    scott
    Vehicle
    1997 ws6 trans am
    Location
    garden city ks
    Posts
    16

    Default

    i meant p/w-ms* sorry

  3. #23
    LTx Guru


    Status
    Offline
    Join Date
    Apr 2013
    Vehicle
    1994 Formula
    Location
    Central NJ
    Posts
    1,967

    Default

    Was it indicating closed loop? If the PCM has lost power (battery disconnect) the LTFT's reset to 128, and stay there until it goes into closed loop. And the PCM losing power would have cleared the code for the coolant temp sensor. STFT's are always 128 in open loop. The PCM richens the mixture on cold start by increasing the injector pulse widths. This is why you have to look at the entire log, to see what everything else is doing, and how it’s changing with time.

    I've given GaryDoug a link to this thread, to see if he can help you with exporting the file(s).

  4. #24
    LTX Regular


    Status
    Offline
    Join Date
    Dec 2011
    Location
    Louisiana
    Posts
    180

    Default

    Kansas, Just for the sake of checking. Disconnect the coil wire from the coil and check for corrosion on the aluminum terminal. Polish with red scotchbrite if it's corroded.
    My wife's '94 had near exact symptoms while it was still under warranty, dealer mechanic cleaned the terminal up and installed a new coil wire and it ran perfect.
    I have replaced optis and wires during it's life and found the terminal corroded again. (cheap aluminum). The later LT1 coils had a different style coil wire attachment(same style plug wire connector as the optispark.
    Last edited by JOATMON; 02-04-2020 at 11:19 AM.
    '94 Z28 Bone stock,4l60e
    '97 SS SLP,T56,385 stroker,AFR210,XFI292,NO traction til top of 3rd gear.
    '57 Chevy 3100 p/u LT1/T56

  5. #25
    LTX Member


    Status
    Offline
    Join Date
    Feb 2017
    Name
    scott
    Vehicle
    1997 ws6 trans am
    Location
    garden city ks
    Posts
    16

    Default

    i went ahead logged it and replaced the opti did a pcm reset and did the steps to re learn and the car is running back to normal. the opti seemed like it had an oring that came off and i had to dig out behind where the splines enter. so as of today its running muuuuuuch better. no stumbles or hesitations. appreciate all the help! also could of been a mixture of the temp sensor connector being full of crap also. i wish i would of got the cable and scan9495 sooner to have before and after data logs.

Page 3 of 3 FirstFirst 123

Bookmarks

Posting Permissions

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