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Thread: converter lock up

  1. #1
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    Default converter lock up

    not sure if i'm missing something, but cruising home from the track yesterday, my converter would not lock on the highway.

    i was in 4th, doing 120 (kmh), 8% tps value, my table is at 85kmh up to 20% tps. the only way it would lock, was if i went in thru the scanner and commanded it.

  2. #2
    Joe (Moderator) joecar's Avatar
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    Are you getting any misfires (log the misfire pids)...?

  3. #3
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    yesterday i did get p0300 a few times....nothing changed in the car, first time it happened, does this prevent lockup?

    any ideas on p0300, checked all the wires, plugs and so on....and nadda

  4. #4
    Joe (Moderator) joecar's Avatar
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    Do rightclick->More Info on the various TSTATE pids (upto from TSTATE00 upto TSTATE12) and log the ones that contain the reasons for TCC release...

    also log MFTOTAL;

    if you get consistent misfire counts above some threshold, then the PCM will not apply the TCC... the TSTATE bits will show the reason why.

  5. #5
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    did a log. are ls1's more sensitive to tps position? seems to unlock very easy, didn't notice anything out there in the log. no codes and misfires.

    it did lock up when over the vss value, just seemed that if unlocked and still above the engage point, was hard to get it to re-engage, had to play with the gas pedal to get it locked again.

    i could email you the log if you want to look at it, don't have a way to host it myself.

  6. #6
    Joe (Moderator) joecar's Avatar
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    You can post copies of the log and tune files in this thread...

    Click Go Advanced and then click Manage Attachments.

  7. #7
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    here is the log. thanks joe
    Attached Files Attached Files

  8. #8
    Joe (Moderator) joecar's Avatar
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    Steve40,

    Is this a 4L60E/4L80E transmission...?

    Log these pids: TSTATE09, TSTATE10, TSTATE12 (the 1st two show TCC unlock reasons),

    Remove all the other TSTATE pids,

    and take another log... (sorry I should have been more specific on which TSTATE pids).

  9. #9
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    sorry bout that log, not sure what i did, here is a new one.

    its a 4l60e. it seems that i notice it unlocking if the tps value goes below 5%. is that a factory setting?
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  10. #10
    Joe (Moderator) joecar's Avatar
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    I looked in the log file, but it doesn't contain TSTATE09 and TSTATE10... we really need those 2 pids...

    Remove: TSTATE59, TSTATE60.

    Add: TSTATE09, TSTATE10.

    To maximize sample rate, also remove: SHRTFT1, SHRTFT2, HO2S11, HOSS21.

    Save your pid selection to file before taking another log.

    Also post your tune file.

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