444xt Cummins First post, the good, bad, and ugly of a 444xt Cummins.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Manurehauler, Feb 9, 2010.

  1. k100 4 ever

    k100 4 ever Bobtail Member

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    Aug 25, 2021
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    the 1980s where the best years for long living trucks if you looked after them ive had new and will keep my old ones pre 1993. electronics are nice but not when you need a wrecker for a new truck lol and a truck payment
     
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  3. SmokinCAT

    SmokinCAT Road Train Member

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    Oct 20, 2010
    Hillsboro, OH./ Adrian, MI
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    I didn't mean the pressure from the tank, I meant the actual rail pressure the pump is supplying under load to the heads.
     
  4. k100 4 ever

    k100 4 ever Bobtail Member

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    Aug 25, 2021
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    i know what you mean i did all that work to it before. im waiting for summit to send me an in dash gauge but i have a high psi gauge for the rail but need a quick connect fitting to plumb it in i didnt think i would have had any fuel issues updating the fuel lines to teflon so im pretty sure the water separator is almost plugged btw the fuel pump has never been touched still has a little red ball in the end of the shaft where the throttle hooks up it hasnt been drilled out
     
  5. k100 4 ever

    k100 4 ever Bobtail Member

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    Aug 25, 2021
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    i took the truck out grossing 135,000.lbs after changing both filters on the fass pump and 22psi on the boost gauge this time was the highest i have seen it get . gauge for the fuel psi that will be next week .
     
  6. k100 4 ever

    k100 4 ever Bobtail Member

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    Aug 25, 2021
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    installed gauge and have over 200 psi under load .also remved the ball and adjusted screw 3 turns counter clockwise and found boost increased quicker but only 22 psi . i removed the fuel button and it has a #10 so i put it back in and only 800 pyro on a long pull it still has paint on the turbo and manifold
     
  7. Ezrider_48501

    Ezrider_48501 Road Train Member

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    Apr 2, 2011
    bismarck, nd
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    if you have only 22psi boost with 200lbs of rail pressure id be looking for a boost leak or a damaged turbo. when is the last time you ran the overhead?
     
    Last edited: Sep 11, 2021
  8. k100 4 ever

    k100 4 ever Bobtail Member

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    Aug 25, 2021
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    its never had anything done it only has 5000 miles on it . i hope the turbo is ok im not sure what i would replace it with . ive ran it a couple days with 3 turns out on the shaft screw then i went with a 4th turn now the boost gauge gets up to 25 psi and still 800 on the pyro .im not looking for smoke i would just like to peek it out a it
     
  9. kranky1

    kranky1 Road Train Member

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    Sep 16, 2015
    Ontario, Canada
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