1999 Ram 3500 - Cranks but won't start - Dodge Cummins Diesel Forum
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Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 98.5-02 24V Forums > 98.5-02 Powertrain
98.5-02 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect..NO ADVERTISING .

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Old 03-07-2008, 07:45 PM   #1 (permalink)
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1999 Ram 3500 - Cranks but won't start

Truck has fuel to new injection pump and Fass system installed. No fuel coming from injectors. Any help?
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Old 03-08-2008, 02:26 PM   #2 (permalink)
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crack a few of your fuel lines...they get an air lock in the i/p and it can't push fuel through...I usually crack just my #1 injector line since it is the furthest away/longest line...and then she'll fire and run rough til you close the line again. Try that first before you dig into anythign else, and if that doesn't work we'll go from there
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Old 03-08-2008, 02:30 PM   #3 (permalink)
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I have tried to bleeding this at two injectors. I also noticed that the fuel pump will only run for 2-3 seconds. I can not make it run for 20 + seconds by bump starting.
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Old 03-08-2008, 02:36 PM   #4 (permalink)
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hmmmm...that doesn't sound right. I know when I bump start mine my walbro runs for a good approx 10 sec or so...you do have the relay from the ecm plugged into the fass then obviouosly right? Also, all wiring harnesses are hooked up to the IP? You wsaid you are getting fuel at the I/P right, just not past it to the injectors?
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Old 03-08-2008, 02:48 PM   #5 (permalink)
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my stock lift pump only runs for a acouple seconds.. if I bump it, it seems like it will run for 20+ but its really only like 10 seconds I think you have everything hooked up right pop your gas cap off when you try to bleed it that might help a little..

sorry just now read that you CAN NOT make it run for 20+
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Old 03-08-2008, 02:50 PM   #6 (permalink)
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I am getting fuel to the I/P but not thru it. I have cycled the fuel pump over a dozen times and am not getting anything thru it. This is exactly what was happening on the old I/P.
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Old 03-08-2008, 02:50 PM   #7 (permalink)
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with that said I dont think everything is hooked up right.... LOL
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Originally Posted by GETERDID View Post
my stock lift pump only runs for a acouple seconds.. if I bump it, it seems like it will run for 20+ but its really only like 10 seconds I think you have everything hooked up right pop your gas cap off when you try to bleed it that might help a little..

sorry just now read that you CAN NOT make it run for 20+
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Old 03-08-2008, 02:53 PM   #8 (permalink)
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Does anyone know what makes the fuel pump run for 10 + seconds when you crank?
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Old 03-08-2008, 03:51 PM   #9 (permalink)
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it gets signal from that wiring harness down by the starter...your lift pump should be hooked into that. it tells you lift pump to stay running
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Old 03-08-2008, 04:09 PM   #10 (permalink)
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Do you know what triggers it? Crank position sensor?
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Old 03-08-2008, 06:30 PM   #11 (permalink)
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Now that's a good question. I'm not sure on that, but Crank position sensor would be one helluva good guess..hopefully someone else knows for sure and can chime in
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Old 03-08-2008, 06:45 PM   #12 (permalink)
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grab your self a can of good old starting fluid and spray that thing up already. unplug the grid heaters first or else turn the key on and let the wait to start light to turn off then wait a few minutes go spray it with starting fluid and fire it up!! your pump is air locked that will get it going
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