I actually believe the tank was empty, and thus the beginning of the reason I jumped to the wrong conclusion. Like I said in a different post I was out of the country and came home for a quick vacation. and jumped at the IP. I have worked on a bunch of big diesels ( equiptment, trucks and busses ) so I am not completely ignorant. I probably wound not pull the fuel tank unless I was getting a bunch of trash in the filters on a regular basis. I pressure washed the engine bay and complete bottom side of the car today ( the good part of owning a 12 car carrier, is I use it as a lift ) as I am still leaning toward a little exploratory surgery on the engine. HMMMMMMM ??