5.9 Cummins fuel problem (Still)

retiredtravelers2013 wrote:
We own a 99 HR Endeavor with the 5.9 Cummins.
Last year after returning from a 4 month winter trip we wanted some maintenance done. My mechanic called me and told me he had trouble starting the MH. He determined it was the electric fuel pump and replaced it. We went on our 14-15 winter trip and had no problems.
In spring we wanted annual maintenance. My mechanic informed me he had the same problem again (starts runs for 3-5 seconds and dies) and replaced the pump again. It happened to him yet again and this time he installed an OEM pump. I brought the coach home. Tried to start it a couple of weeks later and it happened yet again. This time he thought it was sucking air somewhere in the line from the tank to the pump. He tightened everything and it started. He called me last Wednesday and said it was all set. They had checked it at least 15 times and it started. We went to pick it up Friday AM and same thing happened.
Any of you wise people have any ideas?

Look for a bad GROUND wire - either the direct or a secondary to the Battery - if he still has the old pump do like most mechanics do, "Check it out on the bench to see if it is truly the Problem" if it works on the bench then likely the ground.

Over the years the grounds become an issue, on many occasions.

JMHO,