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Thread: Closed loop reqirements on E38

  1. #1

    Closed loop reqirements on E38

    Ive got 3 cars that get kicked out of closed loop while cruising around.

    It only seems to happen under steady cruising with MAP and TPS staying constant and at lighter load cruising. Once it gets kicked out of closed loop it will stay in open loop until you come to a stop(get back into idle LTFT cells) or if you push the car into PE it will go back to closed loop once you get back out of PE or if you push the clutch in and free rev the car a couple times it will go back to closed loop.

    Does the e38 have something other then then whats on the OL/CL page in HPtuners that affects when CL is triggered?

  2. #2
    Senior Tuner DSteck's Avatar
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    What's commanded lambda going to when this happens? Sounds like its running the O2 and catalyst tests.

    DSX Tuning - Authorized HP Tuners Dealer
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  3. #3
    Post cat 02 test running.

  4. #4
    It jumps from 1 to 1.087.

    I am going to try disabling the test and see what it does. Wont this keep some of the readiness test from completing?

  5. #5
    Senior Tuner DSteck's Avatar
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    Sometimes.

    DSX Tuning - Authorized HP Tuners Dealer
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    Just say no to bull s***.
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  6. #6
    Turning off the post cat 02 test did it.