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Thread: Open loop AFR at idle just prior to it going into closed loop

  1. #1

    Open loop AFR at idle just prior to it going into closed loop

    Guys,

    When I first start the car and it's idling in Open loop it bounces between 11.8 and 12.3. It goes to 14.7ish once it goes into closed loop as normal. But what table or parameter do I change to make that 11.8 run a bit leaner? I see no reason for it to be that rich. I am running speed density and have no maf. Do I simply update the VE table in the kpa cell of concern at idle or is there another table that is referenced either by coolent temp or something else that I can update without touching the VE?

  2. #2
    Advanced Tuner
    Join Date
    Sep 2017
    Posts
    736
    Theres an open loop afr command table under open loop. Obviously you would need to change VE to meet the command.
    1997 30th SS. Torqhead 24x, TFS heads, 223/235 cam, 4l80e, S60 D1SC 14psi

  3. #3
    Potential Tuner
    Join Date
    Oct 2019
    Posts
    1
    I have this same issue, does it almost feel like it?s missing also? Mine idles rough and is jumping from 10.8 to 12.8. Can?t seem to get the ve table to help.