We took it to the shop the 1st time and they replaced the fuel pump. 1 week later it started sputtering and dying again so we went back to the shop. They kept it for 3 days, driving it and letting it sit and run... nothing. They even hooked it up to the computer and nothing showed up. We picked up the truck 1 week ago and it started dying again. Any ideas?

 

could be something as simple as fuel filter. that wont set off a code.