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Thread: Injector HELP please.

  1. #1
    Tuner in Training
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    Injector HELP please.

    Can anyone give me the injector data for a GM part number 12594512. It is a 36lb flex fuel injector from a 2007 and newer Silverado, Thaoe, Yukon. Any help would be appreciated.

  2. #2
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    I bet you can find it in the tune repository

  3. #3
    Tuner in Training
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    Already looked through all of it. Nothing for 36lb flex. I found a file from a 07 flex fuel Tahoe with the same injector part number I have but the graph is different. For the 02 model it's flow rate vs kPa and for the 07 it's flow rate vs pressure delta. Dunno if I can still just use the numbers or what. I have an issue with the truck running lean and WOT only at the 1-2 and 2-3 shift. I have to let out just a little to let it shift. Checked fuel pressure today and it's not dropping at all.

  4. #4
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    Yeah, remember 07 had the classic and new style in the same year and used different controllers. Lemme see if I can find the thread about transferring data over, its typical for guys with LS2s running LS3/LS7 injectors.

  5. #5
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    http://www.hptuners.com/forum/showth...-To-LS1-Format

    You need Excel to open the spreadsheet but it will do the conversion for you.

  6. #6
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    Awesome. I will try that when I get to work in the morning. Is it possible for the flow rate I have entered in my tune to cause a lean condition during WOT a couple hundred rpms before it shifts??

  7. #7
    Advanced Tuner
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    If you dont have proper fuel data, it can cause all kinds of different issues. Correct injector data is the foundation for a successful tune and the reason for a lot of bad ones.

  8. #8
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    I sure hope getting the injector data right will solve my problem. Thanks for the help. I will post results tomorrow eve.

  9. #9
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    Just a quick FYI. If it has a return style system, your Injector flow rate is the same across the board.. Also your batt offset is the same from 0kpa to the max.
    Thanks,

    Dustin

  10. #10
    Tuner in Training
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    My system is returnless. Walbro 255lph in tank to a corvette filter/regulator then -6 hose to the back of the engine with a Y and -6 to each fuel rail and a crossover in the front.

  11. #11
    Potential Tuner
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    Sounds like your on the right track Mr.Howell.

  12. #12
    Advanced Tuner
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    Howell, I'm curious of the outcome. I am in the same boat. I'm running an LS2 injector (12569113) in a 03 truck that has been converted to returnless with a corvette filter also. I've tried copying the injector data from other vehicle tunes that run these 34# injectors, but I still have small drive-ability issues. I'm not sure if those issues are from incorrect injector data, or the need to retune VE after upgrading.

    I'm just curious if the copy/paste method worked for you...
    2011 Camaro SS
    Thompson Motorsports Dart 427
    ESS Tuning G4 Supercharger 1158whp/1017wtq
    DSX Tuning stuff

  13. #13
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    Swapping the injector data helped a lot. And I believe I have found my 4K rpm and higher lean problem as well. VE will definitely need changes made after you get the right injector info in. Wish I could help more, but I'm learning a little as I go.