95 dodge cummins not running on #1 cylinder? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 09-05-2010, 01:25 AM   #1 (permalink)
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95 dodge cummins not running on #1 cylinder?

after some minor investigation it seems as if the fuel out of the #1 delivery valve is weak compared to the others.

can delivery valves go bad?

truck is definately only running on 5 cylinders. it reacts to cracking the line on the other 5 cylinders.

EGTs are down,boost is still the same. no white smoke,but less black smoke. lift pump pressure 25psi at idle,40 under load.

this happened suddenly. fine one night running on 5 cylinders the next morning.

ideas?
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Old 09-05-2010, 07:14 AM   #2 (permalink)
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delivery valves
Are you talking about the injector?
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Old 09-05-2010, 08:08 AM   #3 (permalink)
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Originally Posted by jedrattle View Post
Are you talking about the injector?
no the actual delivery valve on the pump. i had the injector out and apart. the nozzle was clear.

when you have the line disconnected from the pump and crank the motor you can see the number 1 out put port is weaker than the others.

Last edited by co84rc; 09-05-2010 at 08:09 AM.
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Old 09-05-2010, 10:07 PM   #4 (permalink)
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Quote:
Originally Posted by co84rc View Post

can delivery valves go bad?
Yes.
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Old 09-06-2010, 07:37 PM   #5 (permalink)
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Originally Posted by co84rc View Post
can delivery valves go bad?
Yes.

The camshaft inside the fuel pump can also fail, causing low output volume.

Time for a new pump.
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Old 09-07-2010, 09:49 PM   #6 (permalink)
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Yes.

The camshaft inside the fuel pump can also fail, causing low output volume.

Time for a new pump.
i believe that is what happened to mine. flat lobe on the #1 out put.

found a pump,being installed this week.

thanks for input.
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