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Thread: Headers adjustment questions

  1. #11
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    2002 4.2L I6 Trailblazer LTZ

  2. #12
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    Logs worthless, check out the GM.AFR you are commanding. Starts off at like 4:1 and progresses to 8:1. Waaaaay off, and GM.AFR_B for the LS2 shouldnt even be a valid PID for the P10 as it sits at 14.6 and never moves.

    Also, you're wideband isnt working properly, 7.35:1 AFR isnt right. How do you have it hooked up?

    We really really need those PIDs I mentioned before coughGM.AFRandSAE.LOAD_PCTcough before we can actually do anything.


    Ill look at those cells, but I dont want to mess with them without watching my wideband (which I had to remove because EFILive doesnt have these PIDs and I had to pass emissions).

    Sorry if I come off aggressive, Im really frustrated because I cant tune this damn thing without these PIDs being valid. Had my wideband for 2 plus months and couldnt get it how I liked so went back to my original tune from before.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #13
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    I dont understand the wideband part plus this is my first time using the scan tool. This might be a stupid question but what is the wideband and how can i tell if im using it or not?
    2002 4.2L I6 Trailblazer LTZ

  4. #14
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    If you dont know what a wideband oxygen sensor is then you do not have one. It is an aftermarket oxygen sensor that outputs the actual AFR/EQ Ratio/Lambda value so we can log and record what AFR the engine is actually running at. Popular ones include Innovate Motorsports LC-1 (what I have), TechEdge, AEM Ugo, PLX, etc. The LC1 is the cheapest at $150 online and you can buy a serial cable from member TAQuickness (I have one and it is awesome) to get a digital reading into your V2.

    Read more about them in the LS1 and other sections of the forum, lots of good info in there.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #15
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    If your talking about this http://www.efilive.com/index.php?opt...138&Itemid=143

    then i dont have it. Do I have to purchase this inorder to help with my tuning?
    2002 4.2L I6 Trailblazer LTZ

  6. #16
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    Quote Originally Posted by ScarabEpic22 View Post
    If you dont know what a wideband oxygen sensor is then you do not have one. It is an aftermarket oxygen sensor that outputs the actual AFR/EQ Ratio/Lambda value so we can log and record what AFR the engine is actually running at. Popular ones include Innovate Motorsports LC-1 (what I have), TechEdge, AEM Ugo, PLX, etc. The LC1 is the cheapest at $150 online and you can buy a serial cable from member TAQuickness (I have one and it is awesome) to get a digital reading into your V2.

    Read more about them in the LS1 and other sections of the forum, lots of good info in there.
    Cool! I take a look and try to save some money to buy one as soon as possible.
    2002 4.2L I6 Trailblazer LTZ

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