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Thread: LS2 Maffless Tune - Air conditioning causes dip or stall

  1. #1
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    LS2 Maffless Tune - Air conditioning causes dip or stall

    Stock 6litre L98 E38 maffless tune.

    Idle stock 550rpm LTFT turned on and average -2 in all cells under 60kpa.

    Tune set to open loop at +60kpa and power enrich set to 12.5 to 12.

    Tune works well except when I turn on air conditioning at idle.
    When air is switched on the RPM dips, goes into a stall recovery and stalls.

    What do i do to fix this problem?

  2. #2
    Advanced Tuner BigDaddyCool's Avatar
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    Quote Originally Posted by 123bigkev View Post
    Stock 6litre L98 E38 maffless tune.

    Idle stock 550rpm LTFT turned on and average -2 in all cells under 60kpa.

    Tune set to open loop at +60kpa and power enrich set to 12.5 to 12.

    Tune works well except when I turn on air conditioning at idle.
    When air is switched on the RPM dips, goes into a stall recovery and stalls.

    What do i do to fix this problem?
    That sounds like a torque management thing. Monitor spark tqmgt... Otherwise it still may be a mafless airflow problem in a certain area.
    2017 Toyota Kluger - 10.1" Android Custom Head Unit, Rockford Fosgate Speakers, 85kg Roof Racks. Prev: 2009 Cammed VE SS Sedan, DOD Delete, 210/218 550', RAMJet OTR, HiFlowCats, IQ System, Amp/Speakers.

  3. #3
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    Thanks BigDaddyCool,

    Have reset AC Torque values to 50% of standard....will see if this fixes it.

    cheers,
    BigKev

  4. #4
    Quote Originally Posted by 123bigkev View Post
    Thanks BigDaddyCool,

    Have reset AC Torque values to 50% of standard....will see if this fixes it.

    cheers,
    BigKev
    Why not bump your idle up 50?
    06 Grand Prix GXP, LS4-full bolt ons, Tuned by me

  5. #5
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    Quote Originally Posted by GXPLS4 View Post
    Why not bump your idle up 50?
    because that's a band-aid