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04 cummins no start

Discussion in 'Ram Trucks' started by yearground, Nov 20, 2009.

  1. yearground

    yearground Member
    from muskoka
    Messages: 64

    04 cummins no codes but will not start without ether. Once runnning, goes forever. Turn it off...no start. Suggestions???
  2. got-h2o

    got-h2o 2000 Club Member
    Messages: 2,439

    How are your batteries? Is it turning over with full power......for sure? Even slightly weak batts will cause no start conditions, even on newer diesels.
  3. yearground

    yearground Member
    from muskoka
    Messages: 64

    New batteries. Has happened on mine and a buds 04. Dealer baffled, new crank sensor.
  4. rob_cook2001

    rob_cook2001 2000 Club Member
    Messages: 2,171

    How many miles?? Cold weather?? Any mods?
  5. bh115577

    bh115577 Senior Member
    Messages: 106

    My 2000 would crank over fine but would not start. Never tried ether though. Turned out to be the crank sensor.
  6. sno commander

    sno commander PlowSite.com Addict
    from ct
    Messages: 1,061

    lift pump ever been replaced? check for fuel pressure before your cp3, some have a lift pump in the tank some have it under the fuel filter. i would not use either on that truck.
    also if you got the tools check for rail pressure.
  7. yearground

    yearground Member
    from muskoka
    Messages: 64

    Cranks fine, runs great, will not start even hot has been for 2 years. fuel pump changed to in tank fuel pressure within spec. no smoke or fuel smell its like injectors don't get turn on signal

    DAFFMOBILEWASH PlowSite.com Addict
    Messages: 1,581

    Think it could be the lift pump. When you turn the key to on listen for a buzz from the tank. If you cannot hear anything check for fuel pressure before and at the filter. The shot of starter fluid may be enough to get the system running by letting the injector pump suck from the tank, get it fixed before you burn up the pump !!!

    DODGE-BOY Senior Member
    from OHIO
    Messages: 121

    If its rusty from being a salt truck, you could have a pin hole in fuel line that sucks air and causes it to lose its prime. Had that on a 94 Cummins. Never used ether. Had to put air to fuel tank to pressurize it or push fuel up. Hit the key then and it fired right up. Pulled tank, replaced fuel lines. Worked great after that.
  10. 2003ctd

    2003ctd Senior Member
    Messages: 165

    Does it only do this when its cold outside (like 32 or below) ? My 2003 did the same exact thing, banged my head against the wall for months trying to figure it out, it ended up being the fuel pre heater.... Ice cold fuel was entering the system and the truck would not fire.
  11. stillen

    stillen Senior Member
    Messages: 247

  12. big schmitty

    big schmitty Member
    Messages: 88

    Same thing happened to me and it was a cracked injector body. If the ecm does not see a certain rail pressure if will not start. Either is the only way it will fire. If this is your problem don't drive it to much because it could melt a piston.

    MIDTOWNPC PlowSite Veteran
    Messages: 4,414


    pull the fuel filter, let the fuel in the filter cup settle and see if any water is in the bottom, it will look like an air pocket at the bottom.

    how much diesel in the tank when you have this problem?

    No codes? it would have to say something after you finally got it started... try the on off on off on and see if there are any codes in the dask.
  14. NBI Lawn

    NBI Lawn PlowSite.com Addict
    Messages: 1,797

    Wouldnt an 03 have a "water in fuel" light? It would be easier to drain the fuel filter canister. Should be a little yellow valve deal on the bottom.
  15. sno commander

    sno commander PlowSite.com Addict
    from ct
    Messages: 1,061

    with a craked injector body wouldnt there be diesel fuel in the oil? when you crank the truck over have a buddy crack an injector line to see if you are getting fuel to the injectors. still need to test rail pressure to further diagonse it, i think your rail pressure is weak and something is senseing that and not letting your truck start.

    MIDTOWNPC PlowSite Veteran
    Messages: 4,414

    I was just thinking with no codes, perhaps no lights were showing either and buy pulling the filter you could see for sure. I had a similar problem last week, but my filter was junk, soon as I pulled it truck started.
  17. 04f250fisher

    04f250fisher Senior Member
    Messages: 105

    The truck needs around 6000psi to the injectors to start.
  18. big schmitty

    big schmitty Member
    Messages: 88

    I had no fuel in my oil with the cracked body. It was bleeding pressure off bad enough for the computer not to be able to see the required pressure to start.
  19. leepotter

    leepotter Senior Member
    Messages: 122

    Either is a no no
  20. JohnnyU

    JohnnyU 2000 Club Member
    Messages: 2,037

    While I don't know the start-up figures, that seems very low seeing as the normal rail pressure for these CR engines is around 23ksi.