Plymouth Repair Questions

What happens when it stalls out. Will it crank at all when you try it again. WE need to determine if this is a performance problem or an electrical problem.

Pcm is possible. I would hook up a fuel gauge and find the pressure. If it isn't is spec, then you may have a pump problem.

Two things. First geting the codes read from the computer would be helpful. Second would try a intake valve cleaning procedure and other carbon removal techniques.
First access the throttle body and clean the throttle plate with intake cleaner and a soft brush or rag to remove the carbon fronm the plate and bore surfaces. While your part way there get a look at your air filter and replace it if it needs it. Next add the appropriate amount of seafoam to the fuel tank and also to the intake. It is writen on the bottle but post if you have any questions. Seaform is available at most parts stores.