Help!!!!!!!

Ok im pretty stumped on this so far.. i hope you can shed some light on this for me.. i have a 93 chevy lumina and one day it started stalling.. if i push the gas to the floor while in park or neutral it will not go over 4,500 rpms... im pretty sure its a gas problem though...if the car conks out on me while driving which is does alot now(it only starts stalling when it gets warm.. but no matter what i do i cannot go past 4500 rpm).. after warming up.. i can plug up my air filter to make it suck more gas.. and it will go.. if i dont do that.. it will not start... i have already replaced my pressure regulator thinking maybe the pressure wasnt good.. i also checked the pressure itself.. it seems fine.. 40psi cold.. then warm its 38.. i replaced fuel filter also.... do you think the next option i would have to replace is my fuel pump? Please help me with this issue.. thanks a million..

mine does the same exact thing its driving me nutso!!!! i replaced the cat, the o2 sensor, the fuel filter, and it will not rev unless you give it a tiny bit of gas otherwise it just dies. i am stumped and frustrared to does anyone know whats going on? i am new to these cars, is this a common issue? thanks

Bad gs or too high octane, trychecking for codes.

Well i found the problem to mine... Before i could push the gas and not get it over 4500rpm in park or neutral.. Well this is suppose to happen.. So you dont blow the engine.. i didnt know that.. but that was my issue.. lol... The car would turn off after getting warmed up... that was the ignition module that went out.. its about 70 bucks or so at autozone... after i replaced that.. it ran after it got warmed up.. but then i noticed i was getting gas comin out of my tail pipe and smellin like gas.. well.. .come to find out.. i had 2 injectors that went bad also... .. they were not openin and closing properly. They were just letting gas flow right through them... Not good.. i was getting gas in everything.. oil and stuff too!!.. You can try blowing through the injector with your mouth.. if air goes through.. then replace it.. cause its bad..