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2016+ Toyota Tacoma OVTUNE 1.05 - Tune Development thread

Discussion in '3rd Gen. Tacomas (2016+)' started by OVTune, Jun 9, 2017.

  1. Feb 20, 2019 at 10:30 AM
    SpeySquatch

    SpeySquatch Function over Form

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    I will say that I installed Spark plugs that were darn near identical to stock .040” gap vs the stock .032” and it drove noticeably worse with horrible gas mileage so make sure you put the exact stock plugs in because it does make a difference in these Lexus engines. I found them the cheapest at Summit
     
    Deucer01 and ihatemytruck like this.
  2. Feb 20, 2019 at 10:32 AM
    OriginalMan

    OriginalMan Well-Known Member

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    @OVTune thank you for the registration key. Thank you for all that you do again.
     
    chittyrox likes this.
  3. Feb 20, 2019 at 10:34 AM
    Deucer01

    Deucer01 Well-Known Member

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    Thanks for the reply guys. So then my read on this is if your engine is running smoothly and getting good MPG to not worry about misfires too much.
     
  4. Feb 20, 2019 at 10:37 AM
    OriginalMan

    OriginalMan Well-Known Member

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    It was best if you monitored the stock state of the vehicle before you flashed it so you have a baseline. I would just monitor and if symptoms become more exaggerated then I would raise a ticket to mat. Otherwise, enjoy the tune.
     
    hr206, taco 16 and Deucer01 like this.
  5. Feb 20, 2019 at 10:38 AM
    Deucer01

    Deucer01 Well-Known Member

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    So you can't adjust the gap on these new plugs?
     
  6. Feb 20, 2019 at 10:40 AM
    2017TRDpro

    2017TRDpro Well-Known Member

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    My average morning commute is 20 minutes, say my average RPM is 2,500. I had 9 misfire this morning, all occurred within first 2 miles (cold engine), which is acceptable in my book.

    9 / (20 * 2500) = 0.00018 That's 9 misfire in 50,000 revolutions, which all occurred while engine still warming up. 0.018% misfire occurrences.

    If you really want to get down to the nuts and bolts, every revolution, there is possibility for 6 misfires (6 cylinders), so 9 / (6 * 20 * 2500) = 0.00003. That's 0.003%!

    If you get a handful of misfire while engine is cold, don't worry about it. If you are seeing steady misfire while driving at operating temperature, then start looking. Fuel quality, driving condition, bumpy road, tune, crank position censor, or other sensors, injectors, etc...
     
  7. Feb 20, 2019 at 10:45 AM
    Wixo

    Wixo Best Member

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    What martial art do you train btw?
     
  8. Feb 20, 2019 at 10:51 AM
    BlkTaco47

    BlkTaco47 Well-Known Member

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    Prior to that was: tai chi, baguazhang, black dragon, 7* Mantis, muay thai, iron palm and hapkido(1st style @ 13)
     
    Wixo likes this.
  9. Feb 20, 2019 at 10:53 AM
    Beerpayzdabillz

    Beerpayzdabillz Pastryatarian

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    Sorry to be "thread cop" but please read the blog on OVTune website if you are a newbie. Doing so in place of trying to sort through 2000+ pages of this thread will bring you up to speed. It has good info about what tunes are available, or not available and detailed instructions for install.

    https://www.ovtuned.com/blogs/news/ovtune-tacoma-flash-manager-overhaul

    end of "thread cop". I promise.
     
    commbubba19 likes this.
  10. Feb 20, 2019 at 10:56 AM
    Burmapeak

    Burmapeak Well-Known Member

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    All I’m saying is the misfires I deal with are serious drivability issues caused by a component that has failed. These misfires turn a 4cyl into a 3cyl or 2cyl. A V6 into a 5cyl. or 4cyl. A V8 into a 7cylor a 6cyl. Etc. When one or more cylinders are not firing all hell breaks loose and you know it. The misfires I’m reading about, people seem to not even notice unless the computer monitoring software tells them it happened. So, I could be wrong. Like if you go to the dentist and he or she says “ you have a cavity” and you say “ I don’t feel like I have a cavity”. Well, Do you and it needs to be fixed or don’t you? If I decided to check for misfires and it showed them I personally wouldn’t be concerned unless it caused an actually true misfire being caused by spark or fuel. UNLESS,Mat all of a sudden posted more information on the Toyota Engine & Software explaining why it’s happening and what NEEDS to be done about it to keep the engine from catastrophic failure.
     
    prodemann and Deucer01 like this.
  11. Feb 20, 2019 at 10:59 AM
    Wixo

    Wixo Best Member

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    Nice! I train Kajunkenbo and got my yellow belt in December. Havent been able to go back to train man. Im getting gang banged between school and work :(:fenforcer:
     
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  12. Feb 20, 2019 at 11:06 AM
    SpeySquatch

    SpeySquatch Function over Form

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    Not supposed to because they are a 3-prong and it also says on the box...not like the old single prong
     
    Deucer01 likes this.
  13. Feb 20, 2019 at 11:07 AM
    PhogDog

    PhogDog Well-Known Member

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    Note to self: don't mess with blkbelt42 LOL
     
  14. Feb 20, 2019 at 11:12 AM
    OVTune

    OVTune [OP] Well-Known Member

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    There is a big big difference between a true cylinder misfire and a calculated misfire from sensor precision.
    misfires that the OBD tells you are calculated out of sensor precision and expectation.
    A real, constant misfire is a dead cylinder.

    If the ECU expects that from one crank trigger point to the next trigger point @ the point of combustion should take 0.0001 ms and it takes 0.00011 ms, "misfire" is reported. (basically)
     
  15. Feb 20, 2019 at 11:22 AM
    Mike O

    Mike O Well-Known Member

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    Lots of people are quoting misfire number compared to OEM. It would be helpful to all (maybe even Mat) if the OEM tune being compared to was stated. I have a 2016 and had three OEM tunes. I suspect, but have not logged that the last one that many people have had good luck with addressed this along with other issues. Of course that could be TOTALLY incorrect. The latest Toyota tune might actually have more misfires on the same truck. Cannot tell from what people have posted.

    Or the latest tune could show similar number of misfires, on the same Toyota tune, on the same truck. And the problem is indeed related to another component, environment, etc.

    Eliminating variables is not as easy as it sounds, especially when the matrix of possibilities keeps changing and people don't include references in their posts to which OEM tune they are comparing.

    Just a quick thought.....
     
  16. Feb 20, 2019 at 11:28 AM
    SpeySquatch

    SpeySquatch Function over Form

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    All I know is, I drove to work on the 87 base tune and it was fantastic.
    May upgrade to the 91 "less tip-in" performance tune in the future, but for now. I'm stoked
     
    honey, Mike O and Deucer01 like this.
  17. Feb 20, 2019 at 11:37 AM
    Chipi3s

    Chipi3s Does it rub?

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    Everyones brain is misfiring and causing problems. :-/
     
  18. Feb 20, 2019 at 11:41 AM
    Burmapeak

    Burmapeak Well-Known Member

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    So is your goal, to make your tunes, so the ecu gets the “with-in spec” readings at all times? If so you are a Mad Scientist. What is your favorite coffee? Thanks again for all the work. Can’t wait for 1.05 Performance for my 04B03!
     
  19. Feb 20, 2019 at 11:50 AM
    Rider4

    Rider4 Well-Known Member

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    Matt @OVTune. I gotta say man, you made me smile today. Just did a super easy install that resulted in an awesome upgrade to this truck. Put in the 91 performance tune and love it!
     
  20. Feb 20, 2019 at 11:52 AM
    OVTune

    OVTune [OP] Well-Known Member

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    Would be impossible.
    It is definitely possible that the tune is increasing misfire counts on some trucks.
    Here is what I know from testing on our R/D truck, that very low levels of knock (under half degree of retard) is sometimes picked up as 2-3 misfire counts on cylinder 1. You can verify this by watching feedback right after the counts.
    Here is what else I know, some trucks, regardless of tune, never gets misfire counts as high as some report.
    Factors to consider:
    1. Toyota has a tsb for a crank sensor replacement (which is used to count misfires)
    2. These engines, from what is publicly available info, have messed up crank pulleys from a special coating that disrupts crank sensor signals.
    3. Toyota did not replace them on all trucks, even though, from public data, every truck has this special coating
    4. Trucks outside the TSB range still benefitted from replacing the CPS.
    5. Our tune could very likely create higher misfire counts from modification to ignition timing (calculated from crank sensor) with above outstanding issues in place.

    The next step now, is to test a truck with excessive counts that can be repeated ( not random one day high out of the blue ), and lower ignition globally and check result.

    Problem is, is that majority of truck that have this only happen under certain conditions "cold" and not repeatable from day to day.

    Until we can pinpoint the exact and absolute cause, we are chasing ghosts...
     
    bshammer0, ben dover, Egnaro and 12 others like this.

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