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  1. Can you post your tune please ??

    Can you post your tune please ??
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    Maybe under the EDIT tab there is a Gear/tire...

    Maybe under the EDIT tab there is a Gear/tire wizard. You might have to input the circumference of the new tire.
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    You can test with E10 to be safe and if the...

    You can test with E10 to be safe and if the flexfuel sensor is reading the alcohol content in HPT than you can add just a bit of E85 and see if the sensor reports a higher alcohol content.
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    Your Cruze has a 6 speed trans. It's the 8 / 9...

    Your Cruze has a 6 speed trans. It's the 8 / 9 and 10 speed trans TCM's that are locked.
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    Like 5FDP said... Get your idle RPM up to at...

    Like 5FDP said... Get your idle RPM up to at least 900,.. sometimes even 1,000 rpm at idle is better.
    In open loop you'll always have a fluctuating idle AFR. Even in closed loop the afr will go up...
  6. Post your tune please. maybe someone can spot...

    Post your tune please. maybe someone can spot something and lead you in the right direction.
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    you can zero the IAT adder table. at idle and...

    you can zero the IAT adder table.

    at idle and cruising you should be in closed loop, and you adjust the maf curve to get the LTFT's as close to zero as possible.

    When accelerating, that's when...
  8. Sometimes you have to have internet connection...

    Sometimes you have to have internet connection and HPtuners will unlock the ecm remotely with out you even knowing. Can take up to 30 minutes.

    I read something to the sort.

    I couldn't read my...
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    Northstar maf kit from zzp. I think SLP used...

    Northstar maf kit from zzp.

    I think SLP used to sell a 85mm maf for the 3800 as well.
  10. Thanks mate. Appreciated. I concur, not...

    Thanks mate.
    Appreciated.

    I concur, not being able to upload to the repository breaks my heart.
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    Which Editor version are you using ??? Mine...

    Which Editor version are you using ???

    Mine 4.4.4 will not open your file
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    took a quick look into your tune and your high...

    took a quick look into your tune and your high idle rpm Timing is way too high. ECM might be fighting this high timing. but it doesn't explain why it's doing it when the engine is up to...
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    The IAC being a stepper motor has gears inside,...

    The IAC being a stepper motor has gears inside, and they're plastic. And little plastic teeth don't last forever.

    If you have any scans from before when it was working good, compare the MAF...
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    The wideband sensor in the scanner should be...

    The wideband sensor in the scanner should be called "WB EQ Ratio" and it will report in Lambda.
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    Post your tune so we may look through it, in case...

    Post your tune so we may look through it, in case you missed something.
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    The Idle Control Valve is probably worn or dirty...

    The Idle Control Valve is probably worn or dirty and is sticking.

    It's more common than you think on 3800 cars.
  17. Don't overlook the Regal. Sometimes you can...

    Don't overlook the Regal. Sometimes you can find a 1999-2005 with low miles in excellent shape because plenty of old folks owned them. They're not the prettiest, but they're a good sleeper.
  18. HP Tuners does not recommend having the laptop...

    HP Tuners does not recommend having the laptop plugged into the car. Especially when writing or downloading a tune.
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    Give ZZPerformance a call. If anyone knows...

    Give ZZPerformance a call. If anyone knows it's them.
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    You can't put a high number in the torque demand...

    You can't put a high number in the torque demand and other torque tables and hope it adds power.

    You can't overshoot torque tables.

    Can you post the stock file for comparison please ???
    ...
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    I'm not sure if this will help but here is a E77...

    I'm not sure if this will help but here is a E77 Caddy CTS 2009 stock file...

    96288
  22. HHR Transmission (auto or manual) will never work...

    HHR Transmission (auto or manual) will never work on a 00-04' Grand AM.

    Transmission electronics between 3800 Grand Prix / Regal / Impala etc... are the same as with the Grand AM 3.4 V6....
  23. The 3400 has the same ECM parameters as the 3800....

    The 3400 has the same ECM parameters as the 3800. So I assume the tuning would be very similar.
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    Are you using the latest VCM version ??? My...

    Are you using the latest VCM version ???

    My daily driver 2018 Regal is not on the supported list. And I couldn't download the stock tune either till they released a couple more newer VCM...
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    As far as I know, 2.0 LTG cars with E80 / E80A...

    As far as I know, 2.0 LTG cars with E80 / E80A ECM's have wideband Oxygen sensor. which is great for tuning the fueling.

    You could lower the timing to see if the KR is real or false.

    utube...
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