12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Pump problem?

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Old 08-27-2014, 11:27 PM
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Default Pump problem?

It was running fine I took the fuel cap off and five mins later it **** off I crack the line to the glow plugs and only alittle came out. I primed it and still no fuel. I crack the vent bolt on top of the fuel filter and no fuel and tee pumping it so I think it ran all the fuel out of the filter and lines but what could cause it to run the fuel out but not drawl ant more fuel out the tank. My lines are ok no crenks or nothing. Any suggestions
 
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Old 08-28-2014, 03:07 PM
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Fuel shut down Solenoid ..
 
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Old 08-28-2014, 03:41 PM
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your truck doesnt have glow plugs
 
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Old 08-28-2014, 09:26 PM
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Originally Posted by turbo2332
your truck doesnt have glow plugs
.. DId I miss something .. he didnt say he had GP's ..

Did u miss post ? ... ... Jk .. crud happens ..
 
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Old 08-28-2014, 10:42 PM
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Originally Posted by 4x4manonbroke
Fuel shut down Solenoid ..
Is that lettin it drain back in the tank?? And sorry iam new to this diesel thing
 
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Old 08-29-2014, 02:14 PM
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Originally Posted by Brokencummins
It was running fine I took the fuel cap off and five mins later it **** off I crack the line to the glow plugs and only alittle came out. I primed it and still no fuel. I crack the vent bolt on top of the fuel filter and no fuel and tee pumping it so I think it ran all the fuel out of the filter and lines but what could cause it to run the fuel out but not drawl ant more fuel out the tank. My lines are ok no crenks or nothing. Any suggestions

your an idiot 4X4 grrr.

no the shut down solenoid operates a lever controled by 12v from the key to move the lever on the pump to fuel or not. it is a simple electromagnet with a spring return. your truck has a grid heater no glow plugs. you cracked the lines at the injectors or on top of the injection pump.
 
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Old 08-29-2014, 02:32 PM
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My bad . U did say GP's .. LOL

I would say your Pick up tueb is cracked and thats why when you remove the cap you also remove the vaccum on the tank ..

either that or the Fuel shut down solenoid is not enguaging and thats stopping your fuel from flowing ... NEed to ensure that its enguaging fully to make sure its allowing flow
 
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Old 08-29-2014, 04:31 PM
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Originally Posted by 4x4manonbroke
My bad . U did say GP's .. LOL

I would say your Pick up tueb is cracked and thats why when you remove the cap you also remove the vaccum on the tank ..

either that or the Fuel shut down solenoid is not enguaging and thats stopping your fuel from flowing ... NEed to ensure that its enguaging fully to make sure its allowing flow
.

When I bump it the shut off solenoid works it goes up then when let off it shuts.
 
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Old 08-29-2014, 04:35 PM
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Originally Posted by turbo2332
your an idiot 4X4 grrr.

no the shut down solenoid operates a lever controled by 12v from the key to move the lever on the pump to fuel or not. it is a simple electromagnet with a spring return. your truck has a grid heater no glow plugs. you cracked the lines at the injectors or on top of the injection pump.
cracked at the injectors when it was running I blead them and it ran fine. It idle on its on and it was fine. I took the gas cap off cause that's what happen when I tried to put fuel in it and It shut of and lost its prime. I primed it let it run for 20 mins blead line while running and then I took the cap off and five mins later it **** off. I cracked injector line and no fuel came out. I cracked the little but on the fuel filter and no fuel came out so I think it ran the fuel out the filter
 
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Old 08-29-2014, 04:38 PM
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Originally Posted by 4x4manonbroke
My bad . U did say GP's .. LOL

I would say your Pick up tueb is cracked and thats why when you remove the cap you also remove the vaccum on the tank ..

either that or the Fuel shut down solenoid is not enguaging and thats stopping your fuel from flowing ... NEed to ensure that its enguaging fully to make sure its allowing flow
Where do you think my tube is cracked in the sending unit or the fuel line itself from the tank to pump
 


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