Double R Diesel Custom Cummins Tuning

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Thread: How close is close for values?

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    Basic Member cwendel's Avatar

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    How close is close for values?

    Alright, I am trying to troubleshoot a drivability issue on a stock 2013.

    Low power, big time lag and fuel knock. I have followed the all-data directions and tested stuff but the pressure sensors have me hung up.

    The exhaust pressure sensor does not match the other three but only by about 0.5 psi.

    The other two differ by .1.

    What is the acceptable range for these? Need help!!!!!

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  2. Top Of Page | #2
    Big Daddy! IGOTACUMMINS's Avatar

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    Re: How close is close for values?

    Is this a tuned truck?

    "The grass is greener where you water it"


  3. Top Of Page | #3
    Basic Member cwendel's Avatar

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    Re: How close is close for values?

    Nope, stock as can be.

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  4. Top Of Page | #4
    Big Daddy! IGOTACUMMINS's Avatar

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    Re: How close is close for values?

    Any codes?

    "The grass is greener where you water it"


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    Basic Member cwendel's Avatar

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    Re: How close is close for values?

    No codes.

    Data logged and graphed the sensor and it showed some spikes but attributed that to the cylinders firing.

    Exhaust brake was wonky the last time I drove it to.

    Have not driven in over a week.

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  7. Top Of Page | #6
    RamIt's Avatar

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    Re: How close is close for values?

    Can you provide any log files or outline the data points for these PIDs

    Rail Pressure
    RPM
    Boost Pressure
    MAP
    Injector Duty Cycle
    Accelerator Pedal Position


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  9. Top Of Page | #7
    Basic Member cwendel's Avatar

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    Re: How close is close for values?

    Last time I drove it, the rail pressure was in spec at idle but lagged by at least 1000 while accelerating and over ran by more than that when I let off.

    I am leaning toward a failing FCA or turbo but trying to do my due diligence.

    The truck has 36000 on it while the short only has about 10000~12000 on it.


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  11. Top Of Page | #8
    Basic Member cwendel's Avatar

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    Re: How close is close for values?

    I will get what I can later today.

    Thanks guys for all the help.

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  13. Top Of Page | #9
    Basic Member cwendel's Avatar

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    Re: How close is close for values?

    https://drive.google.com/file/d/1bMs...w?usp=drivesdk
    Found my last data log. I also graphed some of the data and had converted the bar pressure readings to psi for the graphs while also graphing vs throttle position. I hope you guys can help. If not then i go to the dealer mode and start throwing parts.

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  14. Top Of Page | #10
    Senior Member Polaraco's Avatar

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    Re: How close is close for values?

    I didn't see how many miles are on the truck.

    That might help.

    Check the lift pump.


    2003- 3500 RWD Automatic.
    S & B intake, BD Intercooler, Pusher Air Horn, MM3 Double R Tuning, Turbo Timer, electric Flex-a-lite fans, FASS 95,
    50 HP tips, upgrade to 351 turbo, 3.42 gears, Twin air compressors, air bags, Remote dual oil filters, Hellwig sway bar, Front Winch. Home made Fuel Heater, BD Exhaust brake with Torque Lock. Tons of TLC

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