Of recent, my farm truck is being extemely fussy. After replacing the selonoid on the started she fired right up for me. Was idleing nicely. When I begin driving the truck, it starts to run poorly. The 6.5L (not the stock 6.2L) diesel doesn't seem to be getting a steady flow of diesel. Some mornings it will fire right up, but doesn't do well when I try driving it. I've had troubles in the past with the right side fuel tank. I'm wondering if there isnt an issue with the fuel sending units, switch, etc. Any advice would be appreciated.