i got my 97 dodge ram 4x2 360 about 3 weeks ago it seemed to run good then i had a new cat put in it and new 0 2 sensor the person before me that had it ran strait pipes and the o2 sensor was hanging , so i replaced the plugs ,wires , cap, rotor, well the other day it just stalled on me and would not start, the only way it would run was to hold the gas to the floor. so i replaced the air idle control pulled off the intake replaced the gaskets and pan. nothing was really working then i unpluged the o2 sensor and it started, not sure why? so today it did it again i tryed the same thing but didn't work this time and just like that i held the gas to the floor about an hour after it broke down and it started up again, i don;t under stand what is going on please help and it's not giving any codes. please help and i checked the fuel with a fuel gage and it was good it was about 44 to 50 and it was getting good spark. thanks