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cummins b4.5 troubleshooting

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  • cummins b4.5 troubleshooting

    cummins b4.5 will start but only run a few seconds, sounds like fuel is cutting off.
    have changed fuel filter. lift pump, had injection pump (delphi) rebuilt.
    injection pump has 2 fuel solenoids one at top for cutting off fuel and one on lower rear of pump.
    when i first start it have power to both solenoids after it start for a few seconds solenoid on lower rear loses power as it shuts down. have to way half hour or so then it will start then quit.
    when I installed rebuilt injection pump had top dead center pinned, after installing pump bleed lines as i put them back together.

  • #2
    Originally posted by lwhN15 View Post
    cummins b4.5 will start but only run a few seconds, sounds like fuel is cutting off.
    have changed fuel filter. lift pump, had injection pump (delphi) rebuilt.
    injection pump has 2 fuel solenoids one at top for cutting off fuel and one on lower rear of pump.
    when i first start it have power to both solenoids after it start for a few seconds solenoid on lower rear loses power as it shuts down. have to way half hour or so then it will start then quit.
    when I installed rebuilt injection pump had top dead center pinned, after installing pump bleed lines as i put them back together.
    Long shot as to whether you're still around but what year and pump is it?

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