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Thread: Help with csp5 2800rpm fuel issue?

  1. #11
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    I have got my built tranny back in but haven't retested as far as the defuel issue. I will try to retest tonight.

  2. #12
    Junior Member kyle027's Avatar
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    I finally got mine to stop defueling I believe the limiter I was hitting ended up being the boost fuel limiter.
    07 dodge 2500 5.9 cummins, 2inch level, modified air box, deleted exhaust, Efi live tuning, borg warner gov. Solenoid, billet transmission, 35 inch terra grapplers
    22 ram 2500 6.7 6 inch lift 22x12 welds, 37x13.5

  3. #13
    Lifetime Member Mitco39's Avatar
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    Guys, play special attention to your axis's. I fought with this last night before realizing how stupid I was for missing it. Look through your limiter tables and play close attention to the rpm column, you'll see what I saw if you do that.

  4. #14
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    Quote Originally Posted by Mitco39 View Post
    Guys, play special attention to your axis's. I fought with this last night before realizing how stupid I was for missing it. Look through your limiter tables and play close attention to the rpm column, you'll see what I saw if you do that.
    Nope not my issue, I have gone through ALL limiter tables and have rpm axis up to 4200 and have no commanded fuel limiters under 145, I don't get it, my commanded fuel is getting pulled back and then when it shifts to the next gear it goes up and as rpm increases it drops again....



    Green is duration, purple is commanded fuel, each humor where commanded fuel is highest is in the 2600-2900 rpm range

  5. #15
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    Default Help with csp5 2800rpm fuel issue?

    All my limiters are disabled, all my limiter tables go to 4200rpm, and all my limiting tables are set at 145mm^3 above 2600, but I still see commanded fuel being pulled after 2600-2900rpm. any other thoughts?

  6. #16
    Senior Member garrettg.bpd's Avatar
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    Boost pressure needs to be less then 50psi including atmospheric pressure. And fuel pressure need to be close to desired.
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    2006 DODGE RAM 2500 4X4 Industrial Injection R1 100HP Injectors and BAG-O-PARTS, ATS Exhaust Manifold, AFE 67MM Turbo and MANIFOLD

  7. #17
    Senior Member garrettg.bpd's Avatar
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    If the pcm sees 50psi on the map sensor it thanks there a fault. If fuel pressure stays to low it will pull mm3
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    2006 DODGE RAM 2500 4X4 Industrial Injection R1 100HP Injectors and BAG-O-PARTS, ATS Exhaust Manifold, AFE 67MM Turbo and MANIFOLD

  8. #18
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    Default Help with csp5 2800rpm fuel issue?

    Quote Originally Posted by garrettg.bpd View Post
    Boost pressure needs to be less then 50psi including atmospheric pressure. And fuel pressure need to be close to desired.
    Less than 50psi in my tuning? Cause my twins are not meant to be under 60psi at wot. Can you go into a little more detail?

    Also the fuel pressure, I did put in a Duramax spring in my fuel return valve (12psi rated instead of 18psi) because I have a Duramax as a second pump. So I would decrease it in the table?


    EDIT- I See I will alter my axis so that it will not go off the table, aka max my table to 70psj even though I don't think the sensor will read that high
    Last edited by CapitalDiesel; March 6th, 2015 at 04:57 PM.

  9. #19
    Senior Member garrettg.bpd's Avatar
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    Rescale the boost sensor so it's max boost is 49.
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    2006 DODGE RAM 2500 4X4 Industrial Injection R1 100HP Injectors and BAG-O-PARTS, ATS Exhaust Manifold, AFE 67MM Turbo and MANIFOLD

  10. #20
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    What will that do? My "fuel limiter, boost" table only goes to 32psi, wouldn't I want either the table to either go higher or the boost sensor to read only up to 31psi? Trying to understand this all, thanks

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