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Thread: Service Engine Soon - Random multiple misfires + running too lean

  1. #1

    Service Engine Soon - Random multiple misfires + running too lean

    The ZHP is whining; Random misfires, and some running too lean.

    Only recent service: put in refurbished/clean fuel injectors.

    Any idea? Quick google search tells me itís vacuum leak problems:
    https://www.youtube.com/watch?v=QiqUAF0zxCk

    I forgot the exact code being thrown, but iíll update that in due time.

  2. #2
    Join Date
    Jul 2018
    Location
    Campbell, CA
    Posts
    163
    Quote Originally Posted by Fried_Chicken View Post
    The ZHP is whining; Random misfires, and some running too lean.

    Only recent service: put in refurbished/clean fuel injectors.

    Any idea? Quick google search tells me itís vacuum leak problems:
    https://www.youtube.com/watch?v=QiqUAF0zxCk

    I forgot the exact code being thrown, but iíll update that in due time.
    Either o2 sensors (unlikely) or there is a vacuum leak, generally at the lower intake boot. Smoke test to confirm.

    Sent from my SM-G973U using Tapatalk


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  3. #3
    Quote Originally Posted by ComradeNick View Post
    Either o2 sensors (unlikely) or there is a vacuum leak, generally at the lower intake boot. Smoke test to confirm.

    Sent from my SM-G973U using Tapatalk
    Will do!

  4. #4
    Looked, couldn't find any leaks... for some reason I checked my oil cap, and it was only threaded with one of the little ears.
    Put it on right, solved the problem!

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