cummins pt pump

Discussion in 'Trucks [ Eighteen Wheelers ]' started by diesel_dude359, Apr 18, 2010.

  1. diesel_dude359

    diesel_dude359 Bobtail Member

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    Apr 18, 2010
    lothian,md
    0
    need info on adjustment on pt pumps preff. a breakdown or exploded veiw having problems with idle plunger otherwise known as a fuel button or stinger and dont tell me to take it to a pump shop !! its not rocket science! theres no info online thanks
     
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  3. AUSSIE DAVE

    AUSSIE DAVE Road Train Member

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    Feb 21, 2010
    OZ - Brisbane
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    I would also like this info if anyone has it, please.:biggrin_25519:

     
  4. V8Lenny

    V8Lenny Road Train Member

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    This is the best I could find from the net.
    [​IMG]
     
  5. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Hesperia, Ca.
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    The pump I ran on my 350 BC1 put out over 300 pounds of rail pressure. I love it ! Of course, I also ran a Holset 4B turbo or was it a 3B, its been awhile. Anyways, you need alot of air and fuel for power. Those was the good old days.
     
  6. diesel_dude359

    diesel_dude359 Bobtail Member

    3
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    Apr 18, 2010
    lothian,md
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    im not sure how much im pushin on the rail but it humps #10 button played with afc adjustment just 2 turns out and the throttle shaft screw 3/4 turn out but im getin a noise like a fuel knock when ya first lay into it goes away like 500rpm higher no shortage on fuel for sure she fills 8inch pipes ntc 400 bc3 just want to make sure im bein safe
     
  7. V8Lenny

    V8Lenny Road Train Member

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    At what rpm it does that noise? It might be overfueling quenching the fire before the boost gets up or it is too advanced timing. If it's overfueling you can tighten the AFC control, helps also little bit on the advanced timing.
     
  8. 1989 Pete

    1989 Pete "Pine Tree Eater"

    What CPL do you have? What other features have you done to the truck? Have you changed Pistons, injectors turbo, do you have a pyro guage have you slowed the timing some? If you answered no to any of them then you need to be careful and be looking for an inframe kit soon.....my 2 cents
     
  9. V8Lenny

    V8Lenny Road Train Member

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    Maybe the worst thing you can do to STC.
     
  10. diesel_dude359

    diesel_dude359 Bobtail Member

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    Apr 18, 2010
    lothian,md
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    well i turn afc back in noise went away and still hauls ### pyro never goes over 600 . loaded or unloaded at 25psi . and mr. 2 cents ( break it and build it stronger )
     
  11. V8Lenny

    V8Lenny Road Train Member

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    So it was just overfueling, good to hear. I had the same "problem" with my racetruck.
     
    cjreckart Thanks this.
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