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Thread: tps not reaching pedal position, why?

  1. #1
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    tps not reaching pedal position, why?

    at the end of this log, pedal position goes to 99.6%, but tps drags behind.....tune is rich, demand torque is high, 4 degrees of retard in places

    what is holding tps back...I've had them match before ??

    tune is open loop maf failed, no stft

    thx
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    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  2. #2
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    I am wondering if it is because I'm in total open loop mode??
    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  3. #3
    Senior Tuner Higgs Boson's Avatar
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    Not open loop but speed density (maf failed). Set your pressure ratio error limit under electronic throttle to 1.9 or so, and try again. What year is the ecm?

  4. #4
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    Quote Originally Posted by Higgs Boson View Post
    Not open loop but speed density (maf failed). Set your pressure ratio error limit under electronic throttle to 1.9 or so, and try again. What year is the ecm?
    It's a 2015 Silverado. So, I should be in closed loop , but with maf failed? at the moment I am in open loop stft disabled, Maf failed

    There are 2 ...MaxPRatio fault A and fault B. both are et to .9000. values are 0 to 1.000 I can change, but get warning message...and which do I change?

    thx
    Last edited by rjw; 08-18-2016 at 11:37 PM.
    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  5. #5
    Senior Tuner Higgs Boson's Avatar
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    Maf failed is speed density. The error caused by the maf failure is limiting your pr by way of throttle.

    Open loop is no issue, I run my 16 Z06 full time open loop.

    Set MaxPR A and B both to 1.9 and override warning.
    There is also a place in TM tab to raise Max Pedal for Torque Model or something like that.

  6. #6
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    Quote Originally Posted by Higgs Boson View Post
    Maf failed is speed density. The error caused by the maf failure is limiting your pr by way of throttle.

    Open loop is no issue, I run my 16 Z06 full time open loop.

    Set MaxPR A and B both to 1.9 and override warning.
    There is also a place in TM tab to raise Max Pedal for Torque Model or something like that.
    I don't see TM Max pedal for T model ???
    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  7. #7
    Senior Tuner Higgs Boson's Avatar
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    you don't have it in your tune. I am not sure you need it anyways, just try with raising PR Max w/Fault first.
    Last edited by Higgs Boson; 08-19-2016 at 08:04 AM.

  8. #8
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    will do.....but why don't I have it?....curious
    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  9. #9
    Senior Tuner Higgs Boson's Avatar
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    Quote Originally Posted by rjw View Post
    will do.....but why don't I have it?....curious
    might have to request it from support for your OS, I asked for it to be added when I was chasing this issue on the 2016 E92, which apparently has no fix right now. had no issue on 14/15.

  10. #10
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    Quote Originally Posted by Higgs Boson View Post
    might have to request it from support for your OS, I asked for it to be added when I was chasing this issue on the 2016 E92, which apparently has no fix right now. had no issue on 14/15.
    I think I'm ok, things have kindof gone the other way.....lol

    thx
    2003 MY Z06 3.3 liter whipple ...sold at around 1000 rwhp
    wip 2015 Silverado w/2.9 Whipple (phase 1 completed) phase 2 in the works

  11. #11
    Tuner in Training
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    God these cars fucking suck...... Keeping the throttle open sucks on these.... nothing like LTX stuff