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Thread: lq4 only idles if i spray brake cleaner in the intake

  1. #1
    Tuner in Training
    Join Date
    Sep 2019
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    33

    lq4 only idles if i spray brake cleaner in the intake

    litfs and stiffs wont register. car dies after 2 seconds of idling unless I help the fueling with brake cleaner. fuel pressure is at 62 psi is this a bad injector causing this?
    Attached Files Attached Files

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
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    Rogers, MN
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    13,513
    Why start a new thread for the same question you had yesterday?

    The log and tune are the same from yesterday and the log is still broken with data not working like RPM. That tune file still has the MAF not failed and those two other VATS codes still enabled.

    I'd still want to be looking at those two things and maybe even smoke test the intake for leaks if you know fuel pressure is good.

    It should run without issue if all the other parts are stock like the stock MAP sensor, stock injectors etc etc.


    If your think it may be a tune problem, go back to the stock tune and just fail the MAF sensor in that tune. See if it runs. Maybe it's something wonky in that 1 bar OS you are using.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner in Training
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    Sep 2019
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    33
    oh shit sorry wrong files okay ill try that