I've been having a problem with starting the truck for a while but it seems to be getting worse.Some times I can turn the key on to start it and it starts right up. Other times I have to turn the key on and off multiple times to get the fuel pump to come on then it starts.Some times it starts and runs rough and dies,but once it does start it runs fine no problem.It was doing it some last year and I changed the fuel filter but no difference.I don't know if it's the fuel pump,some kind of module or wiring.Any ideas.Parts are so extensive and pulling the tank is a drag so I'd like to figure it out and fix it once.Thanks,Doug