Thanks for the come back. I have contacted the local CAT dealer and Freightliner. The CAT dealer at first thought it was the injector actuator valve and gave me one to try. But in the process of checking with parts, found out that my valve is internal to the injector pump and not serviceable. They are now saying I will have to tow it into their shop for analysis and service.
Freightliner told me to make sure I haven't lost fuel prime over time or in the process of changing the fuel filter. They said to do this by sealing the fuel caps by putting baggies over the fuel caps and put them back on and then pressurizing the fuel tank by putting an air pressure hose into the vent hose on the tank. The only problem with that is I can't get under the coach to find the vent hose and I don't want to put it on jacks to do that. So I guess unless someone has some other ideas, I will have to have it towed.