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Thread: 05 TT GTO intermittent stumble/ dying

  1. #1
    Potential Tuner
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    Aug 2018
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    05 TT GTO intermittent stumble/ dying

    got a fresh TT build currently being tuned and I'm having issues with it stumbling at idle and sometimes dying also have issues when accelerating it just shut all engine power off then back on and it will buck ... also if u get a pull in and coastdown it will try to die as well... anyone got any ideas please let me know . Car does have a scaled tune with ID1700X injectors and an e40 ecm.. everything is new in the car except ecm and harness and tb
    Attached Files Attached Files
    Last edited by 05lsxGoat; 08-09-2020 at 07:01 PM. Reason: Added logs

  2. #2
    Senior Tuner
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    Mar 2011
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    If you'll post your tune, we can help you with it.

  3. #3
    Potential Tuner
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    Aug 2018
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    Noone ?

  4. #4
    Senior Tuner Lakegoat's Avatar
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    Jul 2012
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    Florida
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    P0101, 102, 103 need to be "mil on first error", not no mil . I have never seen base running airflow all one number.
    2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
    2013 Silverado 5.3, 6L80k 8.8

  5. #5
    Tuning Addict blindsquirrel's Avatar
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    Apr 2017
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    Not properly in speed density - DTCs are set to 'no MIL light', should be 'MIL on first error'. Log shows no MAF DTCs set.

    You have the catalyst test disabled, but post O2 test still enabled? Why?

    I have never seen a tune scaled the way this one is. I am not a scaling expert but I do know that 2.18 X 63.492 does not = anything close to the flow rate ID's posted .xls file shows for those injectors.

    Also, the log file I looked at is TWENTY SEVEN MINUTES LONG. In the future, can you please snip it down to show a section, preferably like 30 seconds or so, where it shows the problem happening?

  6. #6
    Tuner in Training
    Join Date
    Aug 2020
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    Check under Idle, Airflow, Effective Area-
    Double the Percent Max Values and see if that helps with your idle.