95 Sunfire backfiring/hesitation?

Hey.. I got a 95 Pontiac Sunfire with a 2.2L 4 cylinder 3 speed trans. Its got 225,933 miles on it.. here for about a month and a half its been acting really weird.. when it get at normal temp it will be extremely hesitate when I try to take off.. The car will do a pt pt pt pt then act right but everytime i stop at a stop sign or a traffic light it will do a pt pt pt pt pt and act like its gonna die but then act right... well today i was playing around pressing the throttle and all of a sudden i get a backfire in the intake.. soo far i've checked the MAP sensor ( good), the TPS (good), O2 sensor (good), Fuel Pressure (it sits at 45 PSI) i've took apart the intake plentum and cleaned all the carbon out and replace the gasket (No difference), Did a OBDII test only thing it came up with was the neutral safety switch ( no other codes than that).. I changed the plugs and wires and tested the coil packs... I'm all outta options.. dont know what to look at and what to do!! any ideas would be awsome....