Page 2 of 11 FirstFirst 1234 ... LastLast
Results 11 to 20 of 109

Thread: TCC releasing at crusing speeds with light throttle

  1. #11
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    Quote Originally Posted by joecar View Post
    Looks to me like TP rate exceeds threshold for unlocking TCC.


    Attachment 15953Attachment 15954
    Think my TPS is bad because theres no way that i mashed down to 50% when that stuff was happening.

    unless that was my response due to the fact that I could no longer maintain speed with the stall unlocked.

    What should i do to fix that ?

  2. #12
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Log shows TP going from ~20% to ~70% in a few frames... you don't recall pushing it down that much (VSS starts increasing in the next few frames)...?

  3. #13
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Take some more logs, repeat the test but keep the throttle as steady as you can.

  4. #14
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    Sure thing

  5. #15
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Also, test your TPS (measure voltage as you operate the throttle).

  6. #16
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    thats what i was wondering if my TPS was messed up... Its actually off of the TB on the marine intake... If they have a different rate then that may be the issue... I could put my old one on there....

    That would make sense.

    I can check it with the key on using the dashboard right?

  7. #17
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    I did not have time to re log today but i did find a knock sensor low voltage code... Could that have anything to do with it?

    P0327

    Since 4th and TCC gererally produce a little bit of knock?

  8. #18
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Knock won't cause the PCM to unlock the TCC... but misfire will.

  9. #19
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    Attachment 15980

    So here's my log file from tonight... made sure to do no spikes or anything.

    All the cars were driving slow on the road so it was hard to get a good log.

    But there is one point during driving where the TCC came out early its the first good sprint at about 55 mph.

    It disengages and the TPS is around 20% which in my tables corresponds to a disengagement speed of about 36 mph.



    How do you get the line graphs that you sent me from your EFI live screens?

    Thanks for your help.

  10. #20
    Lifetime Member HellKnightHicks's Avatar
    Join Date
    Mar 2011
    Posts
    268

    Default

    Posted that in the wrong spot a minute ago... Sorry about that.

Page 2 of 11 FirstFirst 1234 ... LastLast

Similar Threads

  1. Light Throttle Surging
    By Behold in forum General (Petrol, Gas, Ethanol)
    Replies: 4
    Last Post: July 28th, 2013, 03:49 PM
  2. Trans hits 4th hard with light/no throttle, fine with moderate throttle
    By Supercharged111 in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 6
    Last Post: April 4th, 2013, 12:10 PM
  3. TCC slips at light throttle
    By rumblebox in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 2
    Last Post: December 5th, 2012, 05:13 AM
  4. light throttle surge.
    By activity233 in forum Gen III V8 Specific
    Replies: 11
    Last Post: November 25th, 2012, 12:14 PM
  5. Replies: 23
    Last Post: May 23rd, 2010, 08:38 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
  •