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Thread: Toyota Repository

  1. #101
    Quote Originally Posted by sctundra View Post
    Same exact thing going on with my truck. LTFT about 20% lean at idle. Stock TRD tune, but happens with both 480cc and 550cc injectors.
    Did you ever get your truck to not run lean at idle. Thanks
    in park minimum injector pulse width has bigger effect on afr as long as you dont have a mechanical issue like a leak in fuel or air (vacuum).

    in drive or reverse adjust your maf until you get 0%

    dont make any changes to the maf in park
    Last edited by QTR FMS; 12-29-2020 at 08:22 PM.

  2. #102
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    Quote Originally Posted by QTR FMS View Post
    in park minimum injector pulse width has bigger effect on afr as long as you dont have a mechanical issue like a leak in fuel or air (vacuum).

    in drive or reverse adjust your maf until you get 0%

    dont make any changes to the maf in park
    Thank you QTR FMS!!

  3. #103
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    Have a long way to learn with HPtuners, but glad I can log some runs. Maxed out my injectors and high MAF numbers. Thinking of upgrading to 650s. Still need to adjust MAF as LTFT are high. 2015 SC Tundra, RCF TB, TRD Blower, 55mm pulley, race exhaust, OBX LT headers, meth injection.
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    Last edited by sctundra; 01-04-2021 at 08:34 PM.

  4. #104
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    Quote Originally Posted by 4firemandan View Post
    Does anyone running 650 Deatschwerks injectors have info on what to enter for the "Injector Constant" and "Injector Constant Inv" tables?

    I saw where they give the Battery Offset data and have that info for the Voltage Offset chart (8-16v)... But unsure on the 2 main numbers for "Constant".

    If I go off an estimate of what the TRD injectors are, "480" (page 2)... = 0.098381 Constant.... then the 650's would be 0.0726509 (650/480 = 35% increase... 0.098381/1.35= 0.07265)

    For the inverse, if I compare the 0.0726509 to my stock FFV data (0.11019 Constant, a 51.5% difference)... the stock inverse is "2.10962".. so if I multiply by the same percentage(51.5%), I am guessing that the inverse for the 650s is 3.22378?

    Does that sound right?

    0.0726509 Constant
    3.22378 Inverse Constant

    Curious on both checking my math and if anyone is actually running these and what numbers you are using and how they are working. Thanks!
    This is what Deatschwerks calculated for the Tundra. Just ordered some of their injectors so this is what I will start with.
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    Last edited by sctundra; 01-08-2021 at 07:06 AM.

  5. #105
    Quote Originally Posted by sctundra View Post
    This is what Deatschwerks calculated for the Tundra. Just ordered some of thier injectors so this is what I will start with.
    dont bother calculating the inj const as the maf scale is limited to 512g/s in some ecus after 450g/s the ecu doesnt compensate, you are going to end up running lean anyway, start by leaving your maf as its and adjust the inj const until you are 2-5% richer than your target from there you can adjust your maf.

    or you can use stock maf and add 15% fuel or start with trd maf scale before adjusting the injector const

    and beside that the 650cc are too small if you already maxed 450cc, we were able to use 1600cc at 58psi (id1300) on the stock ecu no issue other than cracking which you can work around

  6. #106
    Quote Originally Posted by sctundra View Post
    Have a long way to learn with HPtuners, but glad I can log some runs. Maxed out my injectors and high MAF numbers. Thinking of upgrading to 650s. Still need to adjust MAF as LTFT are high. 2015 SC Tundra, RCF TB, TRD Blower, 55mm pulley, race exhaust, OBX LT headers, meth injection.
    your tune need alot of work start by raising your torque model and remove throttle limit if any, change your pe 1.333 is really good starting point especially if you are on stock piston and rods, you may lean it out a bit maybe pe 1.25 because you have meth you dont really need to run leaner its better to scale your maf with your meth kit off and then turn it on to raise the timing.

    do you have external fuel pressure regulator cause you definitely need more fuel, once again 650cc is not enough fuel injectors for tundras over 12-14psi

    make your pe kick in quicker, 40 throttle "enable" and 35 throttle "disable"
    Last edited by QTR FMS; 01-07-2021 at 12:52 PM.

  7. #107
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    Quote Originally Posted by QTR FMS View Post
    your tune need alot of work start by raising your torque model and remove throttle limit if any, change your pe 1.333 is really good starting point especially if you are on stock piston and rods, you may lean it out a bit maybe pe 1.25 because you have meth you dont really need to run leaner its better to scale your maf with your meth kit off and then turn it on to raise the timing.

    do you have external fuel pressure regulator cause you definitely need more fuel, once again 650cc is not enough fuel injectors for tundras over 12-14psi
    make your pe kick in quicker, 40 throttle "enable" and 35 throttle "disable"
    Thank you again. The WOT run was with the TRD Tune and 550cc Injectors. I already bought the 650cc injectors and that is the limit I set as this is not a built motor. Boost is 10 psi. I am attaching the tune currently running (Basic TRD Tune) and the one I slightly modified to run the 650cc injectors. Will readjust Injector constant for the 650cc injectors once installed. Have lots of learning to do with HpTuners and any advise is appreciated.
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  8. #108
    Quote Originally Posted by sctundra View Post
    Thank you again. The WOT run was with the TRD Tune and 550cc Injectors. I already bought the 650cc injectors and that is the limit I set as this is not a built motor. Boost is 10 psi. I am attaching the tune currently running (Basic TRD Tune) and the one I slightly modified to run the 650cc injectors. Will readjust Injector constant for the 650cc injectors once installed. Have lots of learning to do with HpTuners and any advise is appreciated.
    the tune is actually better than i thought, i have made some changes just fyi your cruise control might not work properly if you have the newer ecu,
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  9. #109
    Tuner in Training talsayed's Avatar
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    just fyi your cruise control might not work properly if you have the newer ecu
    .
    Why the cruise control might NOT work properly?? Any clue?

  10. #110
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    Quote Originally Posted by talsayed View Post
    .
    Why the cruise control might NOT work properly?? Any clue?
    Not sure but cruise control still worked perfectly on my 2015 Tundra.

  11. #111
    Quote Originally Posted by talsayed View Post
    .
    Why the cruise control might NOT work properly?? Any clue?
    the newer ecus uses the torque model to set the speed, if you raise it, it will get stuck on full throttle until you disable the cruise control.
    another issue is the throttle hang on deceleration.

    i believe it only happens on the 2048k ecus 2017 and above.

  12. #112
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    Quote Originally Posted by QTR FMS View Post
    the newer ecus uses the torque model to set the speed, if you raise it, it will get stuck on full throttle until you disable the cruise control.
    another issue is the throttle hang on deceleration.

    i believe it only happens on the 2048k ecus 2017 and above.
    Thanks, QTR FMS. Very interesting to know how the Torque model affecting the cruise control... We wish all Toyota specialist in this forum is lighting more on Toyota ecm strategy..

  13. #113
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    I've finally got great fueling under wot as well as no more false ethanol learning. (16FFV SC 5.7)

    Next step is trying to get this beast to (*as much as possible) sip gas instead of guzzling it while idling and cruising around town.

    I have a humongous intake vs stock, larger tb, overdrive SC pulley.. so it's not going to be getting 30mpg.. But I'd like to try to get more than 10-12 that I have now.

    HPT doesn't seem to have any table to modify cruise afr... Only afr as a whole (currently 14.6 oem)

    I'm not sure if modifying that would be safe or mess with my wot fueling...
    Maybe I can gain some mileage by playing with the cam VVT in cruise and idle cells. (Not entirely sure HOW through.. more exhaust retard and less intake advance?)

    Anybody have experience or advice in the 'safety gaining mileage' department?

  14. #114
    Tuner in Training TNT76's Avatar
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    I thought I'd put this here first instead of starting a new thread, since this one is title "Repository".

    I am chasing a 2017 - 2018 LC 200 series stock file. The twin turbo 1vd-ftv diesel engine with DPF. If anyone has this stock file, could you post it here please.

    I'm excited to tweak this engine and especially the trans to help that 6th gear stay engaged! Anyone played with these much?

    Thanks for any help.

  15. #115
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    Here is a 2014 tundra with a mag s/c trying to help a buddy out. It was tuned at sea level an now at 4500ish an getting a lean code cel. Dont know the injector size but they look maxed out but its read a high ethanol is that what makes the injectors max out?

    lannie stock.hpt
    his truck.hpl

  16. #116
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    Quote Originally Posted by Matt1231 View Post
    Here is a 2014 tundra with a mag s/c trying to help a buddy out. It was tuned at sea level an now at 4500ish an getting a lean code cel. Dont know the injector size but they look maxed out but its read a high ethanol is that what makes the injectors max out?

    lannie stock.hpt
    his truck.hpl
    Yes, ethanol at 85% will call for about 30% extra injector pulse width.

    You need to reset the eth content (which unfortunately you can?t do with HPT)... I use a tech stream knock off, dealer can do it, or you can fix the tune and refil a few gallons to get it to start relearning.

    Either way, unless you adjust his trims to get negative stft in cruise and idle, he?s going to see that eth content keep creeping up after fuel ups. I cover that in my posts back a page or so.
    Last edited by 4firemandan; 02-25-2021 at 10:15 PM.

  17. #117
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    Thanks for the reply 4firemandan. I was able to reset an do small adjustment but the inj duty still was to high for a wot log, did what I could on the tune. I was lost why the adjustment I made didn?t have a affect. Come to find out the fuel pump was weak and not able to keep. Fuel psi was fluctuating from 60-20. Dealer is replacing under warranty, I?ll post back when I?m able to start the process over. Thanks again

  18. #118
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    @matt1231
    That makes me nerves, I?m still rocking the ffv pump for the short term and I keep hearing about them falling left and right.

    Glad to help, and yes please let us know what you see after the replacement and tune! 👍

  19. #119
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    Ffv have an internal in-tank regulator that restricts fuel at wot. This has to be disabled.

  20. #120
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    Hi all! I have a 2017 flex tundra with a whipple and am having all kinds issues, It was tuned by a very well known tundra guy in dallas and we have upated the file several times with no luck... keep setting a p219a code and have looked for the reason high an low! just hoping for a bit of advise! here is a log when the code set. and the current tune.
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    Last edited by bj-indy; 04-06-2021 at 07:10 PM.