Stalled out on me 3 times on my 15-minute drive?

So, a few months ago, I drove my truck from NJ to FL and it shut off on me a few times (coolant line snapped, engine stall, overheating). I made it to FL and fixed the line and let it sit. Fixed the overheating issue, and the engine seemed to run fine. However, it started to idle at about 400 RPMs and a check engine light came on, p0332. So, about a month later, I changed the knock sensors and intake manifold gaskets. Then it started to throw a p0327 code and it’s idling at about 500 RPMs. About a week later, I tested the fuel pressure and it was running 42-49 and the check engine light is still on. So, I just drove it for a few more months up until recently the truck stalled on me 3 times on my 15-minute drive home from work. I'm suspecting a clog in the fuel filter. I took it to a shop about 2 months ago for some other work and to my luck the fuel lines are completely rusted so the fuel filter can’t be replaced without snapping the fuel lines. So, I'm taking the truck in to get new fuel lines and fuel filter hoping that fixes the issue. My question is, will a bad fuel pump/filter cause a p0332 code? Also, would the faulty pump/filter cause the low RPMs? And lastly, in this situation, would you suspect the fuel pump or the filter? When I start the truck, I can hear the fuel pump prime strong. Thanks!

The vehicle listed above has a 5.3 Flex Fuel.