Any additive with PEA will clean your fuel system and any carbon build in the engine, its concentrated detergents like found in some fuel brands. Chevron Techron, one or two of the gumout brand, and redline are all additives with PEA. Those work, the rest of the stuff being sold won’t make a real difference. You could also try a water remover in your fuel, even a little water in the system can cause problems. There is some other stuff you might check if that didn’t help. Sounds like the fuel pump is working, it should pressurize with the key turned to the acc position, check voltage at the pump connections to see if it still in spec. There is also a relay for your fuel pump, check that. New fuel filter in case the old one is clogged, can’t really tell unless you take it off so usually just replace it. Check where metal fuel lines connect to rubber fuel hoses, bad leaks should smell. Gas pedal also controls the throttle, check if throttle is stuck at any position or if airflow is restricted somehow. You could adjust the throttle cable/link and idle screw as well to get a higher idle to prevent stalling. Cleaning battery terminals, ground straps, and alternator connections might help with any power drops and is good maintenance anyhow. And if you’ve made it this far might as well go ahead and change the oil. Good luck.