After geting the info from members I called dealer to ask if the magical gauge they need came in. It had not,I asked the service manager about the lift pump he said he hasn't had to replace any in the 5yrs he has worked at the dealership. I went to a friend we hooked a MAC TOOL gauge into the fitting to the front of the engine a schrader fitting(unsure of the spelling),gauge didn't move it trraded on no problem not sure why it didn't move. They are heavy truck mechanics. I then went to local cummins truck center guy said they don't work on them,and didn't have any info on them. His quote was "it sucks but you have to goto dodge and they probably won't know what is wrong". Also yesterday Iwas at a drivethru bank aand the truck almost stalled while waiting first time that ever happened. I also talked to another daoge dealer who was leaning towards water in the fuel,an air leak,or a sensor. I may take it there if the other dealer doesn't get the gauge this week. The dealership did offer a rental car but I told them I bought a truck because I need a truck. they don't have any. My question is an air leak would be constant. and bad fuel would also give a constant problem. dealer was going to get pump so they can put in if it is bad.