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    Trans Shift Mode: Unknown 0B

    07 Suburban with a 4l80e swap.

    TCM - T42 (used info from repository from CHEVY EXPRESS VAN)
    OS: 24239927
    ECM -E38
    OS: 12614088 -> 1250212 (CONVERTED TO 2 BAR SD)


    Issue
    Getting...
  2. Yes. Very interested in an update!

    Yes. Very interested in an update!
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    I've noticed something while looking through the...

    I've noticed something while looking through the logs that my all of my brake apply status bits are flashing on off. Does my vehicle not support those or is there an issue to look into?
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    also noticed while I was testing the TPS...

    also noticed while I was testing the TPS throughout it's range, the current gear bounced from 1st to 2nd? on the throrrle it shows one, when I let off it shows 2nd. Is that because the engine is off?
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    55746 Could someone please check this log? ...

    55746

    Could someone please check this log?

    I was testing the TPS sensor. I was getting a P0121 months ago. Disabled the P0101, P0106 and P0121 in the tune and havent thought twice about it....
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    I zero'd them out. Still have the lean spike...

    I zero'd them out. Still have the lean spike after entering boost...

    what bluecat said about lowering the disable rpm has my interest peaked. What's the downfall of this?
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    I've tried. Cant find anything that matches the...

    I've tried. Cant find anything that matches the format and/or axis of my pcm/tcm.
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    ^^ that.

    ^^ that.
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    It's gotten worse. I've stopped driving the...

    It's gotten worse. I've stopped driving the vehicle in fear of damaging more parts..RPM's only drop ever so slightly in between shifts. Trans shop is up in arms, dont want to even consider looking...
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    Thanks for the help. It's really is much...

    Thanks for the help. It's really is much appreciated.
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    And I'll take a look and let you know. Thank you...

    And I'll take a look and let you know. Thank you sir!

    Also, the tq managment was causing some really weird issues for me. When it would shift it seemed like the torque reduction happened for a...
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    I realy appreciate it. It seems most people with...

    I realy appreciate it. It seems most people with the harness aren't changing the force motor tables. If that's the case, I'm not sure how I would have damaged the trans? Isn't that the table that...
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    Yes sir I have hptuners. I've found some tables...

    Yes sir I have hptuners. I've found some tables last night on ls1tech where I used some of his pressure values. I used bluecats trans tuning program to get my shift speeds pretty close then fine...
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    4l80e Swap Frost/PCM of NC Harness Tuning

    07 Suburban - Turbo - 4l80e swap - circle d 2500 converter - 3.73's - PCM of NC relay harness


    Anyone who knows how to tune these please let me know, willing to pay top $. I can dial in the motor...
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    Are you using the 60e tune with a harness? I've...

    Are you using the 60e tune with a harness? I've been tuning my 07 suburban (76mm turbo, id725's) for the past couple years. The e38 pcm, especially the ones that come in our 07's are very unique....
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    I gave that a go. I'm still getting the spike...

    I gave that a go.

    I'm still getting the spike randomly. It now appears to be more stable during transients while in PE.

    Prior to changing coeff's to 0, for example, it would go really lean...
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    This is driving me crazy... This is the...

    This is driving me crazy...

    This is the factory setting for the zone map boundaries. In trying to understand how these work, I haven't seen any examples with different values for MAP zone 0-1...
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    Depo WB V/7.418 + 0.699 = lambda Awesome...

    Depo WB


    V/7.418 + 0.699 = lambda

    Awesome news Btw!
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    I've now read over this a number of times. And...

    I've now read over this a number of times. And think I now grasp what you are saying. How did you log which zone you were in? and what logic did you use in changing them?
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    I up graded to the custom os so I have the...

    I up graded to the custom os so I have the classic ve tables. And it happens at different map values. The only thing consistent is it happens 2.xx seconds after pe is enabled. I do log fuel trim cell...
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    What do you know. I changed back to VE only and...

    What do you know. I changed back to VE only and set pe to enable at 255Kpa, dumped in 1.22 for the values 100kpa + in the airflow gain table and the spike is completely gone. What is the downfall in...
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    Beat me to it. Looks like it is a base...

    Beat me to it. Looks like it is a base pulsewidth...

    Also, no I do not believe it is misfire.
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    Just finished adding these. Will log some...

    Just finished adding these. Will log some tonight.

    May start working on the airflow gain tables though. Seems like the OP has tried just about everything.....





    Yes it is dead...
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    Files Attached Below: 54283 54284 54286...

    Files Attached Below:

    54283

    54284

    54286

    Attached is a log + config and my current tune. I'll gladly paypal anyone who is willing to spend their time to figure this out.
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    I went back to my VE only tune. Much less...

    I went back to my VE only tune. Much less pronouced but still there, sometimes. Didn't seem to be consistent on time either(always around 2.xx seconds though). Working on disabling PE all together...
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