Dodge Diesel/Cummins Mechanic Advice Needed

Were you ever running a fuel pressure gauge?

The vp44 needs at least a consistent 10 psi of pressure to live comfortably. There is actually a computer inside of the vp44 that can overheat and die from lack of fuel pressure. The diesel actually keeps the injection pump cool. I always recommend something like a fass or Airdog pump. Been there, done that.

Me and dad have an '01 24v and to bled the fuel system, it is really easy. key on key off for three cycles. Turn key and bump the starter (not starting). You should hear the
lift pump for about twenty seconds then time out. This is showing normal operation of the pump. If the pump only cycles a few seconds, the lift pump is dying or probably already dead.

After the lift pump has timed out, locate the valve on the side of the vp44 (looks like a tire valve). Screw the cap off and push a pin or tiny screwdriver in there till the fuel flows out steadily. I do this after anything involving the fuel system.

I know you said the problem is already fixed but it may help you or someone else down the road. Sorry to hear that you want to get rid of it. We love ours and never would go back to a gas truck again. We love the 20+mpg vs the gas getting 15.

Some people convert to the simpler earlier style mechanical injection pump. If you ever need any help, I will try my best to assist. I'm no expert but I do mess with the Cummins engines quite a bit.

If you do the three cycles for the pcm codes and see a "216", that is the code for injection pump timing failure. That probably means that the vp44 won't live much longer. It isn't always a death code for the vp44 though. Could be a low fuel pressure issue.