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Thread: New bad O2 or something else.

  1. #1
    Fuel Injected!
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    Jun 2015
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    New bad O2 or something else.

    Installed heated 4 wire O2 over the winter and took vette out for first time with the new O2 and did some data login, noticed the O2 reading are not fluctuating as they should be, so did I get a bad sensor or something else I should look at. this is with a 7727 ecm, link to log.

    https://drive.google.com/file/d/0B5d...ew?usp=sharing

  2. #2
    Fuel Injected!
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    Jun 2015
    Location
    Ashland, PA
    Age
    57
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    according to this thread on another forum they have a similar proplem with the newer afs75 O2's. when at idle a very narow range witch is what mine seems to be doing.
    http://ls1tech.com/forums/lt1-lt4-mo...ge-design.html

  3. #3
    Fuel Injected!
    Join Date
    Jun 2015
    Location
    Ashland, PA
    Age
    57
    Posts
    90
    I thought I would update this thread, I found a new old style ac delco O2 on ebay http://www.ebay.com/itm/331712333869...%3AMEBIDX%3AIT I installed it and disabled highway mode to get a better data, working much better than the last one, here is a link to the log. https://drive.google.com/file/d/0B5d...ew?usp=sharing

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