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3406 B popping

Discussion in 'Trucks [ Eighteen Wheelers ]' started by kgktm, Apr 19, 2011.

  1. Apr 19, 2011 #1
    kgktm

    kgktm Bobtail Member

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    Jan 26, 2011
    07825
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    91 pete 3406B popping under load,no power.
     
    kgktm, Apr 19, 2011
    kgktm, Apr 19, 2011
    #1
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  3. Apr 19, 2011 #2
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,733
    Jan 30, 2010
    keep stroking.
    0
    could be a bad jakebrake switch on the back of injection pump. when they go bad it will turn on jake when you try to give it fuel. turn off the main jake switch on the dash and it should stop it.
     
    Superhauler, Apr 19, 2011
    Superhauler, Apr 19, 2011
    #2
  4. Apr 19, 2011 #3
    359kool

    359kool Light Load Member

    188
    119
    Jun 18, 2009
    alabama
    0
    Timing Advance.. :biggrin_2554:
     
    359kool, Apr 19, 2011
    359kool, Apr 19, 2011
    #3
  5. Apr 19, 2011 #4
    JohnP3

    JohnP3 Road Train Member

    1,594
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    Feb 21, 2010
    Rock Creek B.C. Canada
    0
    Broken exhaust valve bridge pin, If I was really guessing I would say #5.
    Do a complete valve set and look.
     
    JohnP3, Apr 19, 2011
    JohnP3, Apr 19, 2011
    #4
  7. Apr 20, 2011 #5
    kgktm

    kgktm Bobtail Member

    49
    1
    Jan 26, 2011
    07825
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    Found return line from injector pump blocked off.They had switched to one tank and never ran return to the tank.Ran truck for about 2000 miles.What damage could this have caused to fuel pump or lift pump having no return?
     
    kgktm, Apr 20, 2011
    kgktm, Apr 20, 2011
    #5
  8. Apr 21, 2011 #6
    JohnP3

    JohnP3 Road Train Member

    1,594
    684
    Feb 21, 2010
    Rock Creek B.C. Canada
    0
    A "B" model has a very low amount of fuel return an it is a bleed line to keep air out of the pump fuel galley in the pump, it will not cause a popping it may cause a misfire if the system is compromised and sucking air.
    It is not uncommon to have the #4 hose swell and plug off flow or even the restrictor to be plugged.
    Never seen that damage anything.
     
    JohnP3, Apr 21, 2011
    JohnP3, Apr 21, 2011
    #6
  9. Apr 25, 2011 #7
    kgktm

    kgktm Bobtail Member

    49
    1
    Jan 26, 2011
    07825
    0
    Fixed return line,adjusted valves,checked pump timing everything checked.Fuel pressure is between 40 and 45 psi.When you goose the the throttle you get your normal puff of black smoke but if you hold the rpm up around 1700 and goose it a couple of times but don't let it drop below 1700 between gooses than let it come back down to idle and goose it again no black smoke at all no matter how many times you goose it and engine seemes flat idles fine when you goose it it increases in rpm doesn't miss or anything just not getting the fuel delivery.Shut the engine off and let it sit for a minute start the truck up goose it we get the black smoke puff.Could the governor weights be hanging up and limiting my fuel travel.Has a brand new lift pump,have a bubble gauage installed on the suction side from tank,no bubbles and not starving for fuel.You have to shut engine off in order for what ever is causing the pump to do this to reset.
     
    kgktm, Apr 25, 2011
    kgktm, Apr 25, 2011
    #7
  10. Apr 25, 2011 #8
    shultz2577

    shultz2577 Bobtail Member

    7
    1
    Apr 21, 2011
    0
    :biggrin_25512:
     
    shultz2577, Apr 25, 2011
    shultz2577, Apr 25, 2011
    #8
  11. Apr 25, 2011 #9
    little cat 500

    little cat 500 Road Train Member

    2,055
    1,100
    Jan 17, 2010
    Abbottstown PA
    0
    mine was doing that and the clip in the timer broke the one on the little shaft in the middle of the weights
     
    little cat 500, Apr 25, 2011
    little cat 500, Apr 25, 2011
    #9
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