Results 1 to 2 of 2

Thread: Open loop activating on decel

  1. #1
    Tuner in Training
    Join Date
    Jun 2017
    Location
    NJ
    Posts
    15

    Open loop activating on decel

    On 2017 GMC Sierra I did everything to force closed loop and it enables when I decelerate. Yes DFCO is off (set ECT to 350). It is skewing my results for fuel trims. Any ideas?

  2. #2
    Advanced Tuner dhoagland's Avatar
    Join Date
    Jun 2015
    Location
    Aubrey TX
    Posts
    890
    You should be able to filter your graphs to not record that data.
    Maybe set to only log: TPS above 15% Or if there is a specific fuel trim cell used in decelerate..

    I'm not too good with filters yet. I did not write this, It is to give you an idea of what can be done. I have no idea if it works for your tune EXAMPLE ONLY.

    [50010.242]>176 AND [6310]<16 AND ([50090.156]>20 AND [50090.156.slope(200)]<5 AND [50090.156.slope(-200)]<5) AND ([50121]>14

    Engine operating temperature is satisfied (greater than 176F) and vehicle is not in idle or decel (Fuel trim Cell is 15 or less) with the TPS% above 20% and not moving more or less than 2% over a 50 ms period and lastly not be in PE (Commanded AFRis greater than 14)
    2011 Camaro 2SS Convertible L99 Bone Stock for now
    2003 Dodge 2500 5.9 Cummins QC 4x4. Airaid, 2nd Gen Intake, Grid Heater Delete, D-Tech 62/65/12, Magnaflow. Bully Dog: Propane Injection, Triple Dog W/Outlook Crazy Larry. Edge EZ, BD Flow-Max, 48RE: Sonnax Sure Cure/Transgo combination, Derale turbulator, billet input, Triple Disc, Super servo, 4 ring Accumulator. :beer