Need help with ntc400bc3

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mr hanny, Nov 13, 2020.

  1. Mr hanny

    Mr hanny Bobtail Member

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    Nov 13, 2020
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    Got a 1984 359 13speed 3.90 rears
    Its a cummins recon motor just done a inflame laid down just under 10k miles after inflame now it has no power smokes like no other pulled the fuel button to see what it was cause at this point I had no clue had a 5 in it put a 12 in now fuel psi is at 195-200 at 80k lbs hard pull at 2100 rpm Pyro at 900 truck poors white smoke with a faint hint of black into it has no power boost is getting 34-36 not sure size of turbo fans nice and tight front and back but still when first rolling into the throttle kinda fluttering sound out the exhaust and lags terribly once it gets 18 on boost she takes off from there but still poor white smoke and no power not sure what the issue is few ppl I have talked to think the pt pump is going out ive ran the motor with a new fuel line out of a 5 gallon bucket just to eliminate the thought of a collapsed fuel line or sucking air some where but 0 change any help would be appreciated
     
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  3. LameMule

    LameMule Medium Load Member

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  4. Mr hanny

    Mr hanny Bobtail Member

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    Nov 13, 2020
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    I wouldn't think so I never messed with it when I was in there the 10k miles I put on it I didn't have any issue just happened outta the blue while drivin down the rd
     
  5. Dino soar

    Dino soar Road Train Member

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    Any oil or water mixing?

    I would get a heat gun and check each cylinder to see if you have any cold ones.
     
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  6. Mr hanny

    Mr hanny Bobtail Member

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    No water in oil no oil in rad what would you consider cold far as temp range wise
     
  7. jamespmack

    jamespmack Road Train Member

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    Yep, cyclinder temps on a cold start. Before manifold heat soaks.
     
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  8. Dino soar

    Dino soar Road Train Member

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    They all should be pretty close.

    It should be obvious if you have a cold one.
     
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  9. Mr hanny

    Mr hanny Bobtail Member

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    Nov 13, 2020
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    I took this once before if memory serves me correctly they was all 20-40 degrees range difference but will double check when I get the chance
     
  10. jamespmack

    jamespmack Road Train Member

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    Get the temps from cold. Might have to pull manifold and see which hole, or holes are smoking.
     
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  11. "semi" retired

    "semi" retired Road Train Member

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    An "inflame major"? Sorry,,my '85 Pete, 400BC, sat for a long time, did what you describe, and it was a stuck aneroid valve.
     
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