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  1. Ok, I'll give it a shot. Thanks!

    Ok, I'll give it a shot. Thanks!
  2. Correct, it's the tune I had in the truck...

    Correct, it's the tune I had in the truck originally, which did shift at WOT where I wanted it to. When that tune wasn't shifting correctly after the turbos, I started messing with things. When...
  3. The engine side of things was recently done by a...

    The engine side of things was recently done by a local tuner, and should be a SD 2-bar tune. It put down 580 but it has a misfire on high RPM. Turns out the plug wires were burnt. After replacing...
  4. Ok, so I did a couple of things. 1. Put those...

    Ok, so I did a couple of things.

    1. Put those two abuse tables back to stock
    2. Raised the last two columns of the part-throttle shift speeds to above the WOT shift speeds (similar to the stock...
  5. That tune is essentially a 2007 Suburban, which I...

    That tune is essentially a 2007 Suburban, which I applied after my original tune wasn't working. My original tune had the values closer, and it's the one that is in the truck now. It's attached. ...
  6. 4L80e swap WOT not shifting when expected, part throttle OK

    I'm hoping someone has some insight here. The truck is a TBSS with twin turbos and a 4L80e swap. Truck runs fine and shifts most of the time just fine, but the WOT 1-2 will often hit the limiter. ...
  7. Nobody has any idea? Most of the trans tables...

    Nobody has any idea? Most of the trans tables are set to stock, but I've got to be missing something.
  8. 4L80e swap WOT not shifting when expected

    I'm hoping someone has some insight here. The truck is a TBSS with twin turbos and a 4L80e swap. Truck runs fine and shifts most of the time just fine, but the WOT 1-2 will often hit the limiter. ...
  9. Replies
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    Bringing this back. My truck is a 2008 TBSS with...

    Bringing this back. My truck is a 2008 TBSS with a twin turbo LS2 and a 4L80E (E67 and T42). After spending a day with the Tech 2 and flashing numerous OSes, the T42 is running proper 4L80E code,...
  10. Also, during the event, timing starts out where...

    Also, during the event, timing starts out where it should be, but then drops to the point that it ends up -13 degrees - even though there isn't any knock present. There is later, but that's another...
  11. I was doing some more searching and reading about...

    I was doing some more searching and reading about this, and I was starting to think the blade was getting pushed around by turbulence or whatever since it seemed to be random. I was logging last...
  12. I have tried gas from different stations. I...

    I have tried gas from different stations. I don't believe this is actual knock, as the timing and engine load is fairly low. It might be something mechanical for all I know. I'll have to check...
  13. Here is another example - issue starts at 10:31. ...

    Here is another example - issue starts at 10:31. Here I was able to back off the throttle then get back into it and recover.

    69930
  14. Commanded throttle not following pedal position, also KR

    2008 TBSS / LS2, largely stock, twin turbo, E85. I'm still working on the tune - I've got the VE and MAF pretty close (for street tuning), but occasionally this will occur. Step it down, and it...
  15. The truck has DeutschWorks 95lb injectors, for...

    The truck has DeutschWorks 95lb injectors, for which they provided all the data. I'm running half IFR / IVT, double stoich. I don't think it's right though, because the VE seems to be pretty far...
  16. Factory TBSS tune, accuracy with boost?

    I'm working on the tune for my twin turbo TrailBlazer SS. I've got the boost turned down for now, and I've failed the MAF and I'm running SD only. While the tuning seems to be going fine for now,...
  17. I'm glad you said something about the voltage...

    I'm glad you said something about the voltage offset table again. Your post made it "click" for me finally. Of course that has to be set flat for the pressure I'm running - just like the IFR table....
  18. I'm going the double stoich / half flow method. ...

    I'm going the double stoich / half flow method. No need to reinvent the wheel.

    Going this route, the otherwise stock tune seemed happiest with 50 lb/hr flow rate at 43.5 PSI. Driving around and...
  19. So you're saying the IFR table would be "3" in...

    So you're saying the IFR table would be "3" in all cells, or I should add "3" to the cells? I did just that last night - and while it brought the LTFTs back into line, it still wasn't right. It...
  20. What voltage table? I tried looking for a table...

    What voltage table? I tried looking for a table matching that description, but couldn't find one.
  21. The spreadsheet provided with the injectors...

    The spreadsheet provided with the injectors (attached) specified that at 44.1 psi, the injectors flow 86lb/hr. I divided this number by 2 and put it in the IFR table / all cells. I set the FPR to...
  22. So, after doing as suggested: -Returned tune...

    So, after doing as suggested:

    -Returned tune to stock, copied injector data in SPA / Offsets / etc
    -Multiplied Stoich table by 2 (now reads 43 across the board)
    -Multiplied IFR table and and IVT...
  23. Sounds good, thanks!

    Sounds good, thanks!
  24. This is good news. I was under the impression...

    This is good news. I was under the impression that the double stoich method didn't work with the E67...but maybe I misunderstood. I should've tried it at least, because I wasn't looking forward to...
  25. I'm attaching a log - probably need to set up the...

    I'm attaching a log - probably need to set up the scanner better, but it's a start.

    It's way too rich. I reset the trims and it gets negative pretty quickly. I don't have the WB connected yet,...
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