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  1. The "literature" is wrong then. On all LTGs,...

    The "literature" is wrong then.

    On all LTGs, regardless of year, and HFV6 early gen engines (LF1, LF3, LF4, LFX, etc.), it's as cobaltssoverbooster said. 0* on the exhaust cam means fully...
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    If it's a 2016 or newer, that's expected. GM...

    If it's a 2016 or newer, that's expected. GM switched to a factory wideband O2 sensor for fuel control in 2016, so fuel trims stay active even if commanded EQR is not 1.0.
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    That's precisely what the CARB EO testing process...

    That's precisely what the CARB EO testing process is - a check to ensure the vehicle, when modified, be it by hardware, software, or both, doesn't emit any more emissions than it did from the factory.
  4. The 9 speed uses the T87A also (like the 8 and 10...

    The 9 speed uses the T87A also (like the 8 and 10 sp), so it cannot be read. Not sure if there is tuning support for them.
  5. There's little different in the calibration...

    There's little different in the calibration between 2020 and 2021. But, not to shoot holes in your project, but I don't think using an E92 is going to work, for a few reasons:

    1. The L84 (2019+...
  6. This problem is caused by the "Slave CPU" OS /...

    This problem is caused by the "Slave CPU" OS / Cal segment not matching the main OS. When you flashed the 08 Cobalt SS tune in it, you created a mismatch between the Main OS / Calibration and the...
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    Not only do they need to be programmed with the...

    Not only do they need to be programmed with the correct VIN, but they also need to have the correct software flashed in them for your particular vehicle. I personally haven't tried changing FPCM...
  8. Thread: SWP no-flow?

    by tunerpro
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    SWP = switchable water pump, which these engines...

    SWP = switchable water pump, which these engines do not have.

    The only tuning change you may need to make directly related to the thermostat is the Cooling Fan On/Off temperature thresholds. E.g....
  9. 4 cylinder engines only have one bank of...

    4 cylinder engines only have one bank of cylinders, hence, Bank2 trims will always read something like -100, and the O2 sensors will always zero. This is expected.

    High LTFTs are likely caused by...
  10. Thread: E82 ecu

    by tunerpro
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    3,139

    I doubt anybody outside GM or its suppliers has...

    I doubt anybody outside GM or its suppliers has the schematics (and if they did, it'd be risky to share them on a public forum). I simply made a list of all pins at the ECM that were listed as...
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    I explored this at one point. I don't believe...

    I explored this at one point. I don't believe it's possible because while the T87 / T87A / T93 are "pin compatible" in that the connector type is the same, and the majority of the pins have the same...
  12. Those codes being present, as you pointed out,...

    Those codes being present, as you pointed out, suggest that the FPDCM doesn't like the feedback its getting from the fuel pump. Once the diagnostics fail, all bets are off. The FPDCM in these...
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    Bad news... These use the new (secured) E88 ECM...

    Bad news... These use the new (secured) E88 ECM which isn't supported. :-(
  14. Thread: E82 ecu

    by tunerpro
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    3,139

    GM uses a common code base (and calibration...

    GM uses a common code base (and calibration tables) for all of their gas engine controllers, regardless of the hardware configuration. One analogy might be that Windows operating system has built in...
  15. The AA80E is NOT the same as the TL80-SN in the...

    The AA80E is NOT the same as the TL80-SN in the vsport though it is related. It's unlikely the vsport TCM would run the AA80E, and its certain the P01 won't talk to the vsport TCM... Hate to burst...
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    Mods that increase the exhaust sound can, in some...

    Mods that increase the exhaust sound can, in some cases, cause "false KR". Try putting your OE cats back on and see if it goes away.
  17. I think this would have a reasonably good chance...

    I think this would have a reasonably good chance of working - if your car was a 2014 or newer. The LF3/LF4 uses the E92, which is essentially a more powerful version of the E39 that's in your car. ...
  18. This. Enrichment mechanisms like COT were...

    This.

    Enrichment mechanisms like COT were part of the "whole package" when these engines were originally developed and tested under harsh conditions. If you disable any of them, you're running...
  19. There are different types of bluetooth protocols...

    There are different types of bluetooth protocols with different kinds of bandwidth limitations. The experts would have to comment on it but my suspicion is the v2 is bluetooth LE. This would be...
  20. Thread: E82 ecu

    by tunerpro
    Replies
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    There isn't one, unfortunately. I probed every...

    There isn't one, unfortunately. I probed every single pin marked "unused" in the service manuals. It would seem that GM didn't include the circuitry in the E82 for a flex sensor. :doh:
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    As soon as the C8 is supported. ;) Jokes...

    As soon as the C8 is supported. ;)

    Jokes aside, the technical challenges with the 2021 Tahoe are the same as it is for the C8, so expect it soon after C8 support comes along.
  22. Technically that ECM cannot be read, so a read is...

    Technically that ECM cannot be read, so a read is simulated. The message you're receiving, however, sounds like a wiring issue or a dead ECM.
  23. Thread: Flash counter

    by tunerpro
    Replies
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    With all due respect, if your primary concern is...

    With all due respect, if your primary concern is warranty, don't touch it. Don't tune it, don't put wheels on it, don't even put aftermarket windshield wipers on it.

    I don't think hpt can "adjust...
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    Unless you like blowing your motor, stay away...

    Unless you like blowing your motor, stay away from crackles on these. There's a story out there about someone that was "crackle tuned" by one of the Cruze tuners and he went through 5 motors...
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    You can command more airflow over 5000 RPM, but...

    You can command more airflow over 5000 RPM, but other cal changes are needed to avoid misfiring and charge reversion. The so called "valve float" syndrome.

    Low speed pre-ignition is a phenomenon...
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