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Throttle Position Max at 82.4%

Discussion in '3rd Gen Tundras (2014+)' started by lawfarm, Oct 12, 2018.

  1. Oct 12, 2018 at 11:44 AM
    #1
    lawfarm

    lawfarm [OP] New Member

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    Just installed my new Ultra-Gauge in my 18 Tundra CM with 5.7L v-8.

    At WOT (pedal to the floor), it shows the actual and commanded throttle position maxing out at 82.4%. It feels like WOT, but the throttle position sensor apparently begs to differ. Is there a calibration I need to do (either on truck or UG), is this an error, or am I missing 17.6% of throttle position, and thus not achieving full power? It ramps up to 82.4% and then holds there.
     
  2. Oct 23, 2018 at 5:55 PM
    #2
    lawfarm

    lawfarm [OP] New Member

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    Any thoughts on this?
     
  3. Oct 23, 2018 at 6:01 PM
    #3
    15whtrd

    15whtrd I tried being reasonable, but I didn't like it.

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    I’m curious for results. Maybe take the intake tube off and have someone floor it. Or Gopro?
     
  4. Oct 23, 2018 at 6:03 PM
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    ColoradoTJ

    ColoradoTJ Professional Cat Herding Expert Staff Member

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    Tow haul mode and retest...:thumbsup:
     
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  5. Oct 24, 2018 at 8:54 AM
    #5
    ColoradoTJ

    ColoradoTJ Professional Cat Herding Expert Staff Member

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    Well?
     
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  6. Oct 24, 2018 at 12:30 PM
    #6
    Stig

    Stig New Member

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    TC applies the brakes. Shouldn't affect throttle.
     
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  7. Oct 25, 2018 at 3:34 AM
    #7
    Berettafan

    Berettafan New Member

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    Very interested in this. Please check with tow/haul
     
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  8. Oct 28, 2018 at 8:19 PM
    #8
    lawfarm

    lawfarm [OP] New Member

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    No change with tow-haul.
     
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  9. Oct 28, 2018 at 8:28 PM
    #9
    TokerJoker

    TokerJoker New Member

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  10. Oct 28, 2018 at 8:41 PM
    #10
    Vizsla

    Vizsla Old Member

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    I haven’t checked throttle position, but the carpet prevents full travel of the gas pedal. There is a little more travel if modded. I’m not sure that will improve it, and doubt its worth messing with personally.
    Tc reduces engine power also.
     
  11. Oct 28, 2018 at 9:02 PM
    #11
    ColoradoTJ

    ColoradoTJ Professional Cat Herding Expert Staff Member

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    I guess the timing is changed with tow haul mode to get better engine response than the throttle body opening.
     
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  12. Oct 28, 2018 at 9:18 PM
    #12
    Vizsla

    Vizsla Old Member

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    No timing changes, just increases throttle response(basically tip in), and different transmission parameters. The last thing you would do when towing or hauling would be increasing timing, and that’s where power gains would be.
     
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  13. Oct 28, 2018 at 9:24 PM
    #13
    ColoradoTJ

    ColoradoTJ Professional Cat Herding Expert Staff Member

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    That would make sense so the piston doesn’t magically get destroyed.
     
  14. Oct 28, 2018 at 9:35 PM
    #14
    ColoradoTJ

    ColoradoTJ Professional Cat Herding Expert Staff Member

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    Maybe 82.4% is the optimum set value....
     
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  15. Oct 28, 2018 at 9:41 PM
    #15
    Vizsla

    Vizsla Old Member

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    I think it would go higher with full pedal travel, but doubt it would make even a c hair of a difference. There is almost no scenario that our engines can even use more than 82.4% naturally aspirated, maybe with some forced air. So i agree.:D
     
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  16. Oct 28, 2018 at 9:43 PM
    #16
    ZPMAN

    ZPMAN 2nd place is the 1st looser

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    Take a look at what I came up with, I think with carpet and mats you should get WOT unless you are into shag carpet.
    https://www.tundras.com/threads/urgent-help-with-ecu.33401/#post-837127
     
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  17. Oct 28, 2018 at 10:02 PM
    #17
    Vizsla

    Vizsla Old Member

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    Good info! Keep in mind that electronic gauges are not super accurate, and I think you guys might be looking at different parameters. Yours is throttle blade position, think he is looking at desired/commanded fuel. Been awhile so bit rusty, could be wrong.
     

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