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Thread: 2007 chevy silverado STOCK v6 4.3L vortec LEAN = bad gas?

  1. #1

    2007 chevy silverado STOCK v6 4.3L vortec LEAN = bad gas?

    Why are my o2s reporting my system is LEAN?
    Do I have bad gas?
    Thanks! jons 3rd scan from GTi to Burger King LEAN so still bad gas I think new HPT is out.hpl

  2. #2
    Tuning Addict 5FDP's Avatar
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    So you are getting a lean code from the truck?

    I see that your LTFT are very positive at time, saying that you have a vacuum leak and that will trip a lean code. Otherwise I see that the o2 sensors are working correctly.
    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.