fuel needle started going crazy awhile back. It reads fine when running but once i shut off or go to start up it just goes crazy. None of the other needles do that so wondering what could be wrong. Ive changed out the fuel pump once before. Mechanic tired selling me a desending unit for a couple of 100 bucks but wasnt convinced that was the problem. I seen this same problem on other trucks. Either they stop working or just go crazy like mines. Never heard of away of fixin it......