Its been 3 weeks since I started the 250 and she was previously running perfect. The battery is fully charged. I can here the fuel pump but when I turn the key I get nothing. Anybody have any answers for me. Thanks.
The motor is a 5.8

 

I'd start with battery terminal and solenoid connections and make sure they're clean. Sometimes corrosion will build up pretty quick. It could also be a stuck neutral safety switch. I've also had to take starter off and clean up mating surfaces on it and the bellhousing... had a light coating of rust that caused starter to lose ground.

 

Well I cleaned connections and still no start. Banged on the starter. still no go. Then for sh.ts and giggles I flipped the tank switch from front to rear and it fired. ????? wtf then I stopped the truck and switched it back to the front tank and it started up. freakin weird i'm sorry.

 

Now that is a strange one lol.