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  1. Replies
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    136,984

    Throw up a copy of this tune, and I'll try to...

    Throw up a copy of this tune, and I'll try to take a look later this week.
  2. Replies
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    Glad to hear you were able to get startup fixed...

    Glad to hear you were able to get startup fixed via injectors!

    What you're seeing is the PCM entering flex lockup to go into DFCO - as it locks up, it slows the truck just enough to drop out of...
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    2,537

    That is correct, Knock Feedback (KF) defaults to...

    That is correct, Knock Feedback (KF) defaults to -3.0, which corresponds to no knock (0 degrees retard). When KF is greater than -3.0, the PCM is entering or has entered knock-learn up, which is...
  4. PM me your latest file, and I will take a look...

    PM me your latest file, and I will take a look this weekend.
  5. Generally, any change I make to the Normal table,...

    Generally, any change I make to the Normal table, I also apply to the AI/Cruise table.

    The opposite isn't always true, specifically allowing lockup in lower gears in AI/Cruise.
  6. Replies
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    I had the modified and baseline files flipped on...

    I had the modified and baseline files flipped on my end when I was comparing, so the injector constant should have increased by 12.5% (to 0.078947) since I was carrying a -12.5% correction over, not...
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    136,984

    We do want to minimize fuel trims, but we don't...

    We do want to minimize fuel trims, but we don't want to achieve that by creating air or fuel models that aren't representative of the underlying, physical system. In this case, the airflow model...
  8. Replies
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    Usually a good approach to limit the changes, but...

    Usually a good approach to limit the changes, but have to also be careful about making an "island" where there's a large difference from adjacent cells. Don't have to be overly scientific about it,...
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    Quick thoughts from the log and cal: 1) You'll...

    Quick thoughts from the log and cal:

    1) You'll want to blend the ECT airflow across baro, otherwise small changes in baro above 75 kPa result in fairly significant changes in airflow.
    2) The MAF...
  10. Replies
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    136,984

    To clarify, the IAT table value is referenced if...

    To clarify, the IAT table value is referenced if the airflow value is greater than in the ECT table, not the temperature.

    Referencing the base values per your earlier file:

    132933

    If we had...
  11. Replies
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    For the IAT table, the basic procedure is: 1)...

    For the IAT table, the basic procedure is:

    1) Drive until the ECT reaches operating temp, then shut it off immediately after stopping (to keep IAT low).
    2) Restart the truck and note any issues...
  12. Replies
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    The "easy" way to work Startup Airflow ECT is to...

    The "easy" way to work Startup Airflow ECT is to take an airflow value from a temperature you know works - say 50F - then carry that forward into higher temps at the same baro. Knowing that we...
  13. Replies
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    The problem generally stems from cranking...

    The problem generally stems from cranking injector pulsewidth, exasperated by a few factors (altitude, higher fuel pressure, etc.). Unfortunately, that isn't defined in the calibration for your...
  14. No need to be scared or worried about tuning...

    No need to be scared or worried about tuning converter lock, you can't really cause any sudden failure - the worst that will happen is you find out a revision locks too soon or holds lock too long...
  15. There are a couple things in play. The Load...

    There are a couple things in play.

    The Load Limit tables (Engine -> Airflow -> Electronic Throttle -> Limits -> Torque Based -> Low/High Load) will dictate throttle behavior during cruise.

    If...
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    There are a couple things going on here. ...

    There are a couple things going on here.

    First, by lowering the upshift RPM for 3-4 and 4-5, it's shifting at a much greater throttle angle.

    Before:

    129147

    After:
  17. Replies
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    Attach your tune file (.hpt) and what you're...

    Attach your tune file (.hpt) and what you're trying to accomplish with the shift points and I'll take a quick look.
  18. Replies
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    Which tables, specifically, have you changed? If...

    Which tables, specifically, have you changed? If you post up a copy of your file, we can take a look.
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    There are quite a few updates that are needed...

    There are quite a few updates that are needed now, but probably won't get around to updating that document or uploading some new tools for a while.
  20. Replies
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    If you exceed the upper bound of a table axis, it...

    If you exceed the upper bound of a table axis, it will continue to reference the highest value.

    So, if the highest Engine RPM cell is 6,000 RPM, it will continue to reference that any time Engine...
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    Quick look at your file - are you still on the...

    Quick look at your file - are you still on the stock airbox? Looks like you've scaled things based on your injector constant and MAF curve.

    You can address some of the throttle response with the...
  22. Replies
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    Not capable of being done via HPT. You can...

    Not capable of being done via HPT. You can update the internal speed calculations (and should), but the speedometer itself cannot be corrected via HPT.

    The gear/tire wizard is only available on...
  23. There's no lock, these PCMs can only be virtually...

    There's no lock, these PCMs can only be virtually "read", that includes the factory calibrations, too. You'll still be able to take the file HPT provides you when you do a read and modify it like...
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    If you're running the injectors that came with...

    If you're running the injectors that came with the kit, you can find the TRD base file in this thread, along with instructions on how to scale for new injectors if you're using something else:...
  25. Thread: Tundra SAI

    by SlowNStock
    Replies
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    10,054

    For no throttle intervention due to SAI fault,...

    For no throttle intervention due to SAI fault, increase the values in the Engine -> Airflow -> Electronic Throttle -> Limits -> Sec Air Fault -> Air Fault A/B tables to a value equal to or greater...
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