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  • running lean??

    I just got a custom tune done from texas speed w/ their special they had last month. It runs much better now, but my check engine light came on, durring normal driving, so i scanned it and this is what it came up with-
    P0171- system too lean, left bank on 4 sensor systems
    P0174- system too lean, right bank

    I understand its telling me that im running too lean, but is that due to the tuning or do i need to upgrade my pump or injectors? What do you guys think?
    _davjos81- 02 v6<br /><a href=\"http://www.cardomain.com/id/davjos81\" target=\"_blank\">www.cardomain.com/id/davjos81 </a><br /><a href=\"http://community.webshots.com/user/davjos81\" target=\"_blank\"> <a href=\"http://community.webshots.com/user/davjos81\" target=\"_blank\">http://community.webshots.com/user/davjos81</a> </a> <br /><br />-over $8,000 invested! Too many mods to list, just check out my site!!

  • #2
    did they give u a a/f readout? i wouldnt go above 12.0:1 just to stay as safe as possible. if they did not get an a/f reading asap.
    12.8@110.21 04 srt4, stock computer, stock fuel, stock turbo

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    • #3
      check for:

      Fuel pressure
      vacuum leaks
      intake leak
      exhaust leak before the 02's
      1996 Silver camaro Z28. M6,<br />12 bolt, 4.11\'s, posi, Rear cover, Spec stage 2, loudmouth, more <a href=\"http://home.mainstreamtopics.com/?index=3&module=1\" target=\"_blank\">http://home.mainstreamtopics.com/?index=3&module=1</a> &lt;Mods, Pics & more <a href=\"http://home.mainstreamtopics.com/?index=3&module=2\" target=\"_blank\">http://home.mainstreamtopics.com/?index=3&module=2</a> &lt;Fbody Tech Articals

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      • #4
        Originally posted by HBHRacing:
        check for:

        Fuel pressure
        vacuum leaks
        intake leak
        exhaust leak before the 02's
        Well, i know i have an exhaust leak somewhere on the drivers side. Not sure if its the header or the EGR though. I just replaced the gaskets on the headers when i did a head swap. Ive gone back twice since then and retightened everything, but i cant stop the leak.

        Also, where can i get an a/f readout?
        _davjos81- 02 v6<br /><a href=\"http://www.cardomain.com/id/davjos81\" target=\"_blank\">www.cardomain.com/id/davjos81 </a><br /><a href=\"http://community.webshots.com/user/davjos81\" target=\"_blank\"> <a href=\"http://community.webshots.com/user/davjos81\" target=\"_blank\">http://community.webshots.com/user/davjos81</a> </a> <br /><br />-over $8,000 invested! Too many mods to list, just check out my site!!

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        • #5
          without someone with wide band you can't. But fix teh exhaust leak. it will drive the 02's lean and add un needed fuel.
          1996 Silver camaro Z28. M6,<br />12 bolt, 4.11\'s, posi, Rear cover, Spec stage 2, loudmouth, more <a href=\"http://home.mainstreamtopics.com/?index=3&module=1\" target=\"_blank\">http://home.mainstreamtopics.com/?index=3&module=1</a> &lt;Mods, Pics & more <a href=\"http://home.mainstreamtopics.com/?index=3&module=2\" target=\"_blank\">http://home.mainstreamtopics.com/?index=3&module=2</a> &lt;Fbody Tech Articals

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          • #6
            Originally posted by davjos81:
            I just got a custom tune done from texas speed w/ their special they had last month. It runs much better now, but my check engine light came on, durring normal driving, so i scanned it and this is what it came up with-
            P0171- system too lean, left bank on 4 sensor systems
            P0174- system too lean, right bank

            I understand its telling me that im running too lean, but is that due to the tuning or do i need to upgrade my pump or injectors? What do you guys think?
            I had the same problem on highway. There is no leaks that I can find. Just comes on. It happened 3 times, and for last 4 month its ok. :rolleyes: ??

            [ August 19, 2005, 04:38 PM: Message edited by: iGoRa ]

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