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Thread: No STFT & LTFT??

  1. 07-04-2016 #1
    geo53PSI
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    Question No STFT & LTFT??

    I unlocked a 2002 5.3 swap today and when I went to log the LTFT and STFT were not logging.

    Went through the emissions and removed what was not needed.

    Anybody see something I missed on the tune?

    Thanks in advance!

    Attachment 60622Attachment 60623
    Last edited by geo53PSI; 07-04-2016 at 11:57 PM.
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  2. 07-04-2016 #2
    5FDP
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    That scan shows the o2 sensor not working at all, they never move off of 450mv or so.

    Fix that problem and the trims will come back. You have a power problem to the o2 sensors or they are unplugged/wired wrong.
    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.
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  3. 07-04-2016 #3
    geo53PSI
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    Quote Originally Posted by 5FDP View Post
    That scan shows the o2 sensor not working at all, they never move off of 450mv or so.

    Fix that problem and the trims will come back. You have a power problem to the o2 sensors or they are unplugged/wired wrong.
    You sure are right! All this time I was so focused on the Trims that I did not notice the 02s go up or down!

    Harness was special ordered so i'll see about contacting the vendor for extra info on 02 sensors wiring.
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