mitchellb62

yes i just replaced my lift pump on my 94 12valve-5.9 deisel cummings&it will run for about 2 mins and just die can anyone please tel me why ??? ???

firestorm

Does it 'shut down' smoothly or does it fight the shut down? Does it start back up right after it shuts down or does it have to sit a little, or crank for a longer time? ???<br><br>I Have a 24v, but here are a couple of things to check.<br> 1: Check your hoses and connections for tightness, or possible airleaks<br> 2: Bleed the fuel system real good.<br> 3: Check fuel pressure after the lift pump.<br> 4: Check that the lift pump is not shutting down<br> 5: Check the fuel shut off solenoid.<br>

Mexstan

Agree with firestorm. Answer his questions and that will give us a better guide as to where your problem lies. Also, how much fuel is in your tank?

mitchellb62

o.k. it runs for about 2-3 mins then it just shuts down asthough i sht it off an then it is hard staring again.and uve bled the lines.but maybe not good enough?im new to deisels so thanks for te help and yes i put a new lift pump. thank you ???

firestorm

I would double check your hoses and electrical connections to be sure they are tight. Bleed the system again, NO air in the lines. Then I would check the fuel shut off solenoid.
1:See if the fuel solenoid feels hot to the touch after it shuts down, it should not be.
2: See if you have 12v at the solenoid, while running, and if you loose power there when it dies.
If the FS feels hot, replace it. If you loose power at the FS, you have possibley a bad wire, or connection in that wire. Start chasing wires from there. If all is good, see if you can pull a code.

mitchellb62

;D hey thans alot for the input it really helped me out it was my hoses they were backwards thank you again