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Thread: SD AC Idle issue. COMPLETELY STUMPED

  1. #1
    Advanced Tuner
    Join Date
    Jan 2014
    Location
    Waldorf MD
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    774

    SD AC Idle issue. COMPLETELY STUMPED

    OK so...

    Like the title says...

    I am trying to dial in the VE tables on my 2009 G8...

    2-bar OS...

    When idling in gear with the AC on, the RPM's fall to around 500-600. The car runs like absolute CRAP and I have to place in in P/N to keep it from cutting off. Here's what I've done so far...

    Increased minimum airflow
    Adjusted VE via results from scanner
    Added AC torque
    Raised Minimum RPM Reference
    Zero'd out AC Torque Reduction

    Now in MAF only mode, this DOES NOT happen. Nor does it happen in blended mode.

    I'm at a complete loss. Any help will be greatly appreciates. Tune and log attached.

    Thanks in advance! Oh... the car specs are in my signature...
    Attached Files Attached Files
    Daily Driver= 2003 BMW 330xi
    Weekend Cruiser= 2009 Pontiac G8 GT (Vararam, TSP LS3 N/A Stage 1, OBX, CTS-V converter, MagnaFlows w/ J-Pipes, 160 t-stat)
    Project Car= 1991 Chevrolet Camaro RS (LQ4 w/ Gen 4 Rods, LS3 heads, turbo...)
    Truck= 2007 Chevy Silverado 1500 LT LY5 4x4

  2. #2
    Advanced Tuner
    Join Date
    Jan 2014
    Location
    Waldorf MD
    Posts
    774
    Log file...19-06-27 08-14-04.hpl

    Sitting idling in gear with the AC on. Then going into P/N...
    Daily Driver= 2003 BMW 330xi
    Weekend Cruiser= 2009 Pontiac G8 GT (Vararam, TSP LS3 N/A Stage 1, OBX, CTS-V converter, MagnaFlows w/ J-Pipes, 160 t-stat)
    Project Car= 1991 Chevrolet Camaro RS (LQ4 w/ Gen 4 Rods, LS3 heads, turbo...)
    Truck= 2007 Chevy Silverado 1500 LT LY5 4x4

  3. #3
    Advanced Tuner
    Join Date
    Jan 2014
    Location
    Waldorf MD
    Posts
    774
    I figured it out. Had to max the tables in the "Effective Area" on the left of this pic. I can take a before pic, if y'all want...

    EffectiveArea.JPG
    Daily Driver= 2003 BMW 330xi
    Weekend Cruiser= 2009 Pontiac G8 GT (Vararam, TSP LS3 N/A Stage 1, OBX, CTS-V converter, MagnaFlows w/ J-Pipes, 160 t-stat)
    Project Car= 1991 Chevrolet Camaro RS (LQ4 w/ Gen 4 Rods, LS3 heads, turbo...)
    Truck= 2007 Chevy Silverado 1500 LT LY5 4x4