Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 3 of 3

Thread: 4L60E - Strange TCC LogFile - TunerPro

  1. #1
    Fuel Injected!
    Join Date
    Jul 2014
    Posts
    144

    4L60E - Strange TCC LogFile - TunerPro

    Hi All,

    I am working to diagnose an issue on my 1994 chevy. I've got a 4L60 from Finish Line Transmissions in it and a 454.

    The TCC seems to be going in and out an awful lot... I've been messing with the thresholds using TunerPro and I seem to have been able to impact things when the engine is cold but when it warms up... still have some wacky things going on.

    Attached is a short trace from TunerPro. What I noticed is that the TCC ON and TCC FEEDBACK flags are sort of pulsing on and off all the time... even when in park and not moving.

    I dont see this same thing with my old scan too so i dont know if it is a tuner pro issue or if it is real. In anycase... if anyone has the patience to take a quick look or offer an idea or two- It would be greatly appreciated.
    Attached Files Attached Files

  2. #2
    Fuel Injected!
    Join Date
    Dec 2016
    Location
    Colorado
    Age
    33
    Posts
    100
    Could be the brake switch. Have you looked into that?

  3. #3
    Fuel Injected!
    Join Date
    Jul 2014
    Posts
    144
    I am pretty sure it is not that based on the data from TunerPro. The signal "Brake Switch Override" or whatever it is called seems solid. Nevertheless, it would be worth it for me to spend a little time looking into that further. Thanks for the suggestion!

Similar Threads

  1. Can anybody identify these BCC's and strange code41
    By Dr.E in forum GM EFI Systems
    Replies: 8
    Last Post: 11-26-2015, 02:16 AM
  2. Strange timing issue
    By rsicard in forum GM EFI Systems
    Replies: 7
    Last Post: 03-27-2015, 07:59 AM
  3. 4l60e tunerpro rt and torque signal pressure doesn't exceed 127
    By pima.1971 in forum TunerPro Tuning Talk
    Replies: 10
    Last Post: 03-18-2014, 07:00 PM
  4. Really strange idea of the day!!!
    By jim_in_dorris in forum GM EFI Systems
    Replies: 59
    Last Post: 03-03-2012, 07:21 PM
  5. '94 5.7 Strange EGR issue
    By gregs78cam in forum GM EFI Systems
    Replies: 9
    Last Post: 02-26-2012, 11:22 AM

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
  •