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Thread: Hellcat Fellas! U1424 and P1DD2, what do we know

  1. #21
    Tuner in Training
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    May 2018
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    26
    Quote Originally Posted by tbrtuning View Post
    Scale throttle body airflow up. I never really have problems with the big throttle bodies but always make the same sets of changes so not sure another change doesn't prevent issues. I believe if you go up maybe 30% on throttle bidy airflow you'll be fine.

    Some aftermarket throttle bodies don't seem to close in a way that restricts airflow very well and need quite a bit of air added to table at low near closed voltages to prevent a hanging idle and code.
    Thats Great to know
    Thanks

  2. #22
    Tuner in Training
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    Jan 2019
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    I used these values and it fixed my u1424 code. I also disabled it in the trans tune just to be safe .

    https://photos.app.goo.gl/wQ3ryAi7eFQ9NAz76
    Last edited by Trbobuick; 05-03-2020 at 07:22 PM.
    2015 200s 3.6 AWD
    luciddeath/Demigod tuned
    [email protected]

  3. #23
    Senior Tuner
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    Jun 2004
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    Baltimore, Md
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    Regular 2015 Challenger with Magnuson otherwise all stock, sets U1424 immediately and NEVER have any throttle now, any one have any ideas Ive been beyond stumped on this one
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  4. #24
    GrannySSshifting, simply put back the values to stock in transmission tune under torque management>general>max torque limit. They don't like to be altered. Your U1424 should go away then.

  5. #25
    Senior Tuner
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    Quote Originally Posted by drumnbasslvr View Post
    GrannySSshifting, simply put back the values to stock in transmission tune under torque management>general>max torque limit. They don't like to be altered. Your U1424 should go away then.
    I have flashed it with STOCK program?
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  6. #26
    Senior Tuner
    Join Date
    Jun 2004
    Location
    Baltimore, Md
    Posts
    1,204
    Quote Originally Posted by curt@injected View Post
    Just finished one up. Was having a lot of issues with map sensor rationality checks, torque calculation and getting the etc light @ idle in neutral with p2110. I had to go through and find all of the map checks, the pwm threshold @ idle and the engine torque calculation table and have them all added so that i could get it right. Car drives perfect now. No limp mode driveability is perfect.
    What are the ECM table numbers of the stuff you are talking about so we can tell if its in latest beta for whatever OS we have?
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  7. #27
    Potential Tuner
    Join Date
    Dec 2022
    Posts
    5
    Quote Originally Posted by CravenPerf View Post
    What do we know about larger throttle body flow and torque calculations at or near idle? Working with a monster throttle body on a big blower Hellcat, only issue left with the car is if left idling it throws these two codes. I understand it is flowing more air than it is looking for, but I haven't been successful in harnessing that in yet. Anybody else out there dealt with this yet? When logging idle you can see how far off actual torque vs desired is. Log attached, any thoughts or input appreciated!

    Did you ever figure out the issue, im currently having the same 2 codes pops up
    Last edited by 6.2_JGC; 12-19-2022 at 02:19 AM.