ok, i figured out that i had a bad 02 sensor, got voltage on the driver side and no voltage on other side, so i bought a brand new sensor and put it on the passenger side, run koer and get code 42, this has to be the most f----d up thing i have ever dealt with this car.....
all i wanted to do is rebuild my motor and put it back in so i can drive it...nothing but problems now....and i cant seem to get the help i need, guess i will have to break down and go to a mechanic, which as far as i know their isnt a single place around here that knows a damn thing about 5.0..... fuel pressure is fine, 02 sensors are fine, so i think, and no matter what i do i cant get rid of this hesitation problem at slight throttle........is there a chance that maybe my attempt to port my stock intake might have screwed something up....that is the only difference in my motor now than before i rebuilt it.....maybe i should not have even rebuilt the damn thing, it ran great before, just that it had 160,000 on it. please somebody help so i dont go broke or sell this damn thing....maybe go back to chevy