1997 Ford F-150 Ford F-150 randomly stalls and wont go over

I have a 1997 ford f-150 v8 4.8L.

It has a computer issue where the check engine light comes on and it says my oil is low and my engine is overheating but when I check both they are fine.

I am also having the most annoying issue ever where I will driving for an hour or so and its fine and then all of a sudden as I am idle at a stoplight the truck will shudder a bit and then will not accelerate quickly and once it gets going will barely go over 40 mph.

I will have to pull over and restart the truck for it to work properly and it seems it only happens when I am idle or stopped. I have already put fuel injector and changed the fuel filter and am trying to figure out what the next step is to solve this problem cheaply before I take it to the ford dealership to have them rape me on repair costs.