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Thread: Total Newb Here, Duh...Check This Out Please

  1. #21
    Tuner
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    Jun 2011
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    Still showing misfires. I temporarily swapped in 4 of my LS1 coils on bank 1 and misfires and high fuel trims still present.

    Injectors.have about 130K miles, so I'm told. I should probably swap those out for sure.

    After all that, victory! I had small gaps in my test pipes. I seen carbon trails so I used foil tape to close the gaps and fuel trims all good now.


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  2. #22
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Rogers, MN
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    Sometimes you have to re-poll for supported parameters to find the misfire channels.


    And exhaust leaks are a killer with fuel trims, they will suck in extra air and skew the numbers big time.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #23
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    Quote Originally Posted by 5FDP View Post
    Sometimes you have to re-poll for supported parameters to find the misfire channels.


    And exhaust leaks are a killer with fuel trims, they will suck in extra air and skew the numbers big time.
    Thanks.

    Repoll?
    How do I do that?

    Yeah, I was surprised that air can go backwards up the tube thru a small gap. Logic tells one that pressure keeps air out.

  4. #24
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    Quote Originally Posted by 5FDP View Post
    Sometimes you have to re-poll for supported parameters to find the misfire channels.


    And exhaust leaks are a killer with fuel trims, they will suck in extra air and skew the numbers big time.

    Thanks again.
    I re-polled and got the misfire channels.
    I have a lot of misfires on #1 but the engine is on a stand without full exhaust so install will be next.

    I just figured out how to watch the logs. This is a really excellent device.

    Testing to attach file..................
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