All, I was hauling my 48ft trailer the other day. Stopped at the truck stop to get fuel. Left it running, pulling out it started to run rough at idle. It started loosing power and really idle rough. I needed to go about 4 more miles. Upon stopping truck would barely idle. It will not start back. I had a battery go bad a few weeks ago and totally drain both batteries. I have no CEL or any warnings. First thought was bad fuel. Fuel filter was dirty but not excessive. Fuel looked ok.. Couldn't figure it out. Dealership has come up with needing a lift pump, injectors checked, and a new fuel filter housing. Low rail pressure and high return pressure (which if the injectors aren't firing would To the tune of $3700 and no promise it'll fix it.. I don't think that's the problem. Any ideas or experiences?