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Thread: Engine cuts out when rev limit reached

  1. #1
    Tuner in Training
    Join Date
    Jan 2019
    Posts
    15

    Engine cuts out when rev limit reached

    Hi, As per the title I have a curious situation that when the rev limit is reached, the engine cuts out. I don't mean temporarily as you might expect from, well a rev limiter, I mean if the limit is approached quickly enough such as accelerating hard in a low gear, the engine will hit the limiter and cut out and wont restart unless the ignition key is cycled. I haven't managed to get a datalog yet and the truck is off the road at the moment. I was wondering if anyone could see anything obvious in the tune I'm missing.

    Thanks.

    Rosie LQ9 Knock sensors removed temporary.hpt

  2. #2
    Advanced Tuner
    Join Date
    Dec 2019
    Location
    MS
    Posts
    567
    Thats quite strange.
    I dont see anything out of place in the tune but a log would help for sure.

    What if you raise your fuel cut limiter by 500 rpms?
    I always setup a DBW tune so the ETC catchs the rpms but just incase i set the fuel cut a little higher say 500-600 rpms.

  3. #3
    Tuner in Training
    Join Date
    Jan 2019
    Posts
    15
    Thank you. I've tweaked it and will report back.