You probably have the pick up pipe at the base of the tank,which wasn't DAFs best idea,the inside of the tank can peel,or the chain that used to be attached to the filer cap ends up in the tank,along with other strange items..It has been known to take hours to see hear an item that is blocking the pick up..You didn't say wether you had removed and stripped the fuel filter housing bolted to the tank,This is known to collect any debri before it gets to the filter ,and cause your issue which at a guess will be a yellow engine warning when the engine is under load ie pulling up a hill ..take off the large brass nut and the plunger,and there is 2 small valves that will be covered in debri ,also make sure the elbows are clear
norb, May 2014
