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Thread: ford 39# injector with code runs lean ?

  1. #1
    Tuner in Training
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    ford 39# injector with code runs lean ?

    So I get all the code for the injector and enter them all in.. start up the truck and my stft is 18? Am I missing something here ?

  2. #2
    Advanced Tuner
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    Sounds like you're missing alot! :^o If you want help you're going to have to be a little more descriptive than that.
    Jeff Chambers, Owner
    CRT Performance, LLC
    349 Cleveland Road
    Norwalk, OH 44857
    Ph: 419-668-4151
    Fx: 419-668-4643

    Performance Parts, Service and Dyno Tuning Specialists

  3. #3
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    So I got the ford 39# blue injectors
    entered all the data from this link https://fordperformanceracingparts.c...m-9593-m39.pdf
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  4. #4
    Advanced Tuner
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    So you've got good injector data entered now. Start the tuning process. I'm still not understanding what the problem is. You've given no information about the vehicle, modifications nor provided any useful datalog. People are more than willing to help but you've got to articulate your problem.
    Jeff Chambers, Owner
    CRT Performance, LLC
    349 Cleveland Road
    Norwalk, OH 44857
    Ph: 419-668-4151
    Fx: 419-668-4643

    Performance Parts, Service and Dyno Tuning Specialists

  5. #5
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    Oh ... Sorry lets try this again LOL .. The truck is a 2005 Ford f150 5.4 Procharged 10 psi, water meth, Propane VSI mostly on propane. I installed bigger injectors on the fuel side. After I Installed the injectors and added all the codes in the tables and started up the truck, it was running very lean and rough stft adding 18 percent.
    The Low flow of 48.77280 and a high flow of 40.07880 just doesnt make sense for a 39# injector. If i use a low flow 39.01294 and High flow 32.24041 from another tune using the same Injector the truck runs normal. So Im a bit confused why when I use the codes given to me for the injector the truck runs like crap right from start up.

  6. #6
    Advanced Tuner
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    Use the FRPP calibration data and then adjust the MAF as necessary to trim it in. Your biggest error is likely down in the low flow range where injector characteristics such a minpw, breakpoint and latency have the biggest effect. BTW...the high flow of 40 makes much more sense that 32. for the injector.
    Jeff Chambers, Owner
    CRT Performance, LLC
    349 Cleveland Road
    Norwalk, OH 44857
    Ph: 419-668-4151
    Fx: 419-668-4643

    Performance Parts, Service and Dyno Tuning Specialists

  7. #7
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    ok .. I will try it again and dial the maf to trim it in ... Thanks keep you posted on it

  8. #8
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    ok so I found out the instructions that came with the procharger kit says that the injectors are 39# injectors... When I use the codes nothing works properly on the truck. I did a little bit more digging and found out that the injector that they say are 39# are actually 39.5# injectors. Input all the new codes for 39.5# and everything from start to idle to drive is all normal and trimmed properly with out having to work the maf. Problem solved and truck runs perfect.