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Thread: Help! Surging after start.

  1. Top Of Page | #1

    Help! Surging after start.

    The truck is surging after its started for about 15-20 seconds then levels out. The truck is deleted with a MM3 tuner.

    The MM3 shows rail pressure to fluctuate almost 1000psi while surging. Right now I’m thinking possible weak lift pump or maybe an issue with the FCA.

    Is there anything else I should look at?

    2014 Tradesman


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  3. Top Of Page | #2
    WE WILL STAND! IGOTACUMMINS's Avatar

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    Re: Help! Surging after start.

    Who tuned it?

    "The grass is greener where you water it"


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  5. Top Of Page | #3

    Re: Help! Surging after start.

    Quote Originally Posted by IGOTACUMMINS View Post
    Who tuned it?
    Diesel performance Texas


    Sent from my iPhone using Tapatalk


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  7. Top Of Page | #4
    TH-64's Avatar

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    Re: Help! Surging after start.

    Quote Originally Posted by RamCountry View Post
    Diesel performance Texas


    Sent from my iPhone using Tapatalk
    Doh!! You may have stolen/hacked tuning! That guys been banned I believe.

    Sent from my SM-G950U using Tapatalk

    2012 CCSB Saddle Brown Pearl... DRD tuned

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  9. Top Of Page | #5
    WE WILL STAND! IGOTACUMMINS's Avatar

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    Re: Help! Surging after start.

    Quote Originally Posted by TH-64 View Post
    Doh!! You may have stolen/hacked tuning! That guys been banned I believe.

    Sent from my SM-G950U using Tapatalk
    Yep!

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    "The grass is greener where you water it"


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  11. Top Of Page | #6

    Re: Help! Surging after start.

    Is there anyway to tell if its a hacked tune?


    Sent from my iPhone using Tapatalk


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  13. Top Of Page | #7
    WE WILL STAND! IGOTACUMMINS's Avatar

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    Re: Help! Surging after start.

    Quote Originally Posted by RamCountry View Post
    Is there anyway to tell if its a hacked tune?


    Sent from my iPhone using Tapatalk
    Not really, but that company has a bad rap sheet!

    "The grass is greener where you water it"


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  15. Top Of Page | #8
    TH-64's Avatar

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    Re: Help! Surging after start.

    Quote Originally Posted by RamCountry View Post
    Is there anyway to tell if its a hacked tune?


    Sent from my iPhone using Tapatalk
    Dunno. You just install the tuning, or was it ok at first?

    Sent from my SM-G950U using Tapatalk

    2012 CCSB Saddle Brown Pearl... DRD tuned

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  17. Top Of Page | #9

    Re: Help! Surging after start.

    It started about 6 months after I deleted the truck.


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  19. Top Of Page | #10
    TH-64's Avatar

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    Re: Help! Surging after start.

    Ok. In that case it may be a separate issue like you mentioned. Also could be the fuel rail relief valve. Any codes on your MM3?

    Sent from my SM-G950U using Tapatalk

    2012 CCSB Saddle Brown Pearl... DRD tuned

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