Man that sucks... I have had my eye balls in the fuel tank opening with a led light and the tank is way clean and I put the line tank sock on which was missing....I'm checking out the line from bottom black flex hose under the truck tank to pump...I'm going to put it under pressure with air and see what comes out on a clean white rag...but I have a pump so I will change it out just for grins...with a new fuel line at the same time...see what happens. This weekend I may not have the time...I'll fix it one way or the other....my sort of "related to" mechanic says to stop fooling around its the carb change it period! No more trouble shooting... yeah right...Steve