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  1. It happens. Glad all is OK. Sometimes the...

    It happens.

    Glad all is OK.

    Sometimes the ECM or TCM do some sort of communication with the BCM at the wrong time.
  2. Please post your tune for our reference. Never...

    Please post your tune for our reference.

    Never have anything in the car running when writing or reading the ECM/TCM/FSCM. This means nothing like open/close windows,,, lock/unlock doors,,,...
  3. I think your on the right track regarding the...

    I think your on the right track regarding the MAF/fueling.
  4. How many miles on the engine ? There is...

    How many miles on the engine ?

    There is probably some Intake Valve Deposits and inside the cylinder too. Those can cause pre-detonation.
  5. As far as I understand it, the way GM ecm's run...

    As far as I understand it, the way GM ecm's run the spark timing, is based on if there is KR or no KR and favoring towards minimum or maximum spark timing according weather KR is present or not.
    ...
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    Other problem is, when people had their cars...

    Other problem is, when people had their cars tuned, almost nobody tuning told their customers they were locking their computer. And that's what pissed people off the most. Not that the ECM was...
  7. Thanks for the update. Really dig your...

    Thanks for the update.

    Really dig your vehicle.
    Can you imagine some politicians and their constituents hate everything about what your vehicle stands for. If they had it their way (and...
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    Onstar Communications Control Module ??? ...

    Onstar Communications Control Module ???

    Center Console module ??

    those my only 2 guesses.
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    When VCM Scanner is connected to the vehicle, up...

    When VCM Scanner is connected to the vehicle, up top left, in the Vehicle tab.

    Like mentioned,.. you have to scan cyl airmass in the main channel log for you to use it in the histograms.
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    If no one replies with a definite answer... hit...

    If no one replies with a definite answer... hit up the fellas on the GM V8 (gen 3) sub forum. Most of the GM knowledge is there.
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    Wow thanks for taking the time to do this and...

    Wow thanks for taking the time to do this and post about it.
    Very much appreciated !
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    I'm thinking you should try lowering the driver...

    I'm thinking you should try lowering the driver demand a little more in the 90% & 100 % TPS areas so none of the boxes are more than 80 above factory.

    Then copy DD MAP A to DD map C. just to make...
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    This is probably nothing but I would change this...

    This is probably nothing but I would change this one little thing...

    Torque Management \ TC/SC boost control \ Boost Limits... Boost MAX limit,.. Under the 140 f headder you have it set to 200 kpa...
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    Sorry I misunderstood your question. Just make...

    Sorry I misunderstood your question.

    Just make sure in the tune under "System" (between "Fuel sys" and "speedo")/ General... the Vats control is set pm PWM and not Serial.

    Also disable VATS...
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    There is a quick way of importing all the changes...

    There is a quick way of importing all the changes from one ECM to another. It's called a Template Applicator.

    Here is a quick video explaining on how to use it.

    It's a amazing feature that...
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    MILL Off (Stored Fault) is the only thing you can...

    MILL Off (Stored Fault) is the only thing you can do. It will tell the Emissions testing facility the Rear 02 is Not-Ready. And as far as I know, In most States you're allowed 1 Not-Ready monitor...
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    Just a quick glimpse at your tune, and I think...

    Just a quick glimpse at your tune, and I think you might have overshot the Driver Demand MAP.

    The DD Areas you changed, your demanding 250% more power than stock. That's not gonna work every...
  18. Post your tune please.

    Post your tune please.
  19. What HPT editor version are you running ??? I...

    What HPT editor version are you running ???

    I can't open your tune with my version. I'm using 4.4.4
  20. hehehehe I mean connected power wise like to a...

    hehehehe

    I mean connected power wise like to a auxiliary plug or power converter.
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    I did lots of trial and error stuff on my...

    I did lots of trial and error stuff on my brothers trans (2014 Verano) and believe it or not only a few things need to be changed to make a difference...

    Keep in mind my goal was to make the trans...
  22. This is typical of 3800 ecm adding timing when...

    This is typical of 3800 ecm adding timing when cruising at highway speed.

    Scan cylinder airmass so you can precisely plot and adjust the timing in the corresponding boxes.

    It's not a big deal...
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    Didi you try to re-install the software to the...

    Didi you try to re-install the software to the latest version and see if the problem at the beginning persists ?
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    The MAF curve looks very close to stock ?

    The MAF curve looks very close to stock ?
  25. Can you post your tune please ??

    Can you post your tune please ??
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