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Pyrometer's takin a dump????

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Mooch, Apr 18, 2008.

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  1. Apr 18, 2008 #1
    Mooch

    Mooch Light Load Member

    82
    16
    Feb 24, 2007
    Mildew, OR
    0
    Hope this is the general location to ask this. All of a sudden my Pyro is actin retarded. It doesn't seem to want to register more than 300 degrees in a pull, at idle and just flatland crusin it cools down to almost 0 degrees. I don't remember ever breakin one before, and am thinkin it's got to be fairly easy to fix, either the Pyrometer itself is done, or the part that goes into the turbo is toast, can't remember what that part is called. Like I said think this should be easy ta figure but thought I'd ask you guys before I dove in or called the mech. Thanx :biggrin_25514:
     
    Mooch, Apr 18, 2008
    Mooch, Apr 18, 2008
    #1
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  3. Apr 18, 2008 #2
    SPIKE 64

    SPIKE 64 Light Load Member

    150
    27
    Feb 26, 2008
    San Antonio tx.
    0
    More than likely the problem may be that you have a bad sending unit,It is generaly located on the exhaust pipe just after the turbo,Itl be a screw-on sending unit. They run about $75 depending where you get it at.Hope that cures it.
     
    SPIKE 64, Apr 18, 2008
    SPIKE 64, Apr 18, 2008
    #2
  4. Apr 18, 2008 #3
    Brickman

    Brickman Trucker Forum STAFF Staff Member

    12,905
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    Sep 17, 2006
    WY
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    Depends on the truck. KW wants about twice that for theirs.
     
    Brickman, Apr 18, 2008
    Brickman, Apr 18, 2008
    #3
  5. Apr 18, 2008 #4
    Mooch

    Mooch Light Load Member

    82
    16
    Feb 24, 2007
    Mildew, OR
    0
    It's on an older Pete with 444 Cummins that's pumped up a bit. I know that's a dinosaur to most you guys but she's a good old truck I can't seem to let go of. Oh yeah, thanx for the info:biggrin_25514:
     
    Mooch, Apr 18, 2008
    Mooch, Apr 18, 2008
    #4
  7. Apr 18, 2008 #5
    SPIKE 64

    SPIKE 64 Light Load Member

    150
    27
    Feb 26, 2008
    San Antonio tx.
    0
    Hey Mooch don't forget to put some anti-seize on the threads before you put the new one on,It will help keep the threads in good shape....
     
    SPIKE 64, Apr 18, 2008
    SPIKE 64, Apr 18, 2008
    #5
  8. Apr 23, 2008 #6
    TruckerD99

    TruckerD99 Bobtail Member

    14
    0
    Apr 6, 2008
    Maine
    0
    The part of the pyrometer in the exaust stream is called a thermocouple. Hope it helps!
     
    TruckerD99, Apr 23, 2008
    TruckerD99, Apr 23, 2008
    #6
  9. Apr 23, 2008 #7
    MedicineMan

    MedicineMan Road Train Member

    5,799
    6,440
    Jan 13, 2007
    Woodville, TX
    0
    call pete for a price, get the part number then google it and you can find it for a third the price.

    I'd kill for a 444. Oh and you can't just "pump up" a cummins without wearing out the cam lobes because of the increased preure. the cummins is a PT pump. unlike the cat which pumps a set amount to each injector at the precise time, the cummins pump build preure then the injectors are fired off the cam. If you turn the pump up it dramatically increases the seat presure unless you also have the injectors opened up.
     
    MedicineMan, Apr 23, 2008
    MedicineMan, Apr 23, 2008
    #7
  10. Apr 23, 2008 #8
    dieselhound

    dieselhound Medium Load Member

    410
    39
    Mar 23, 2008
    Erie,PA
    0
    Does it have air 2 air?
     
    dieselhound, Apr 23, 2008
    dieselhound, Apr 23, 2008
    #8
  11. Apr 23, 2008 #9
    Pete_379X

    Pete_379X Super Chrome

    1,006
    123
    Jul 4, 2007
    Arkansas
    0
    I dunno but I can't keep thermocouple bungs in this petercar I'm in now. Its burning them up! But the Pyrometer isn't reading that high. Its melting them down on one side, I guess.... thats the only thing I can figure!
     
    Pete_379X, Apr 23, 2008
    Pete_379X, Apr 23, 2008
    #9
  12. Apr 23, 2008 #10
    MedicineMan

    MedicineMan Road Train Member

    5,799
    6,440
    Jan 13, 2007
    Woodville, TX
    0
    they never do last too long it seems. sucks because they arn't cheap either.
    you may ned to find a source that carries a different brand, they may be using cheap stuff where you are getting them from.

    The old cumins are not air to air like the cats. they use a water to air cooler internally if I'm not mistaken. I'm still learning my cummins. Always had cats before. Why do you ask that though?
     
    MedicineMan, Apr 23, 2008
    MedicineMan, Apr 23, 2008
    #10
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