Pvincil

i have a 94 z28 and it has had a miss for a while but no engine lights have come on. ive ran injector cleaner several times through the gas tank and nothing has changed. if anything, its getting worse. then today when i was driving home, i had to slam on my brakes when someone cut me off. shortly after that, a few miles or so, i was driving and the engine died. rpms dropped to 0, throttle didnt work but all the lights stayed on. i pulled over to the side of the road, then put it in park and tried to restart the car. it turned on the first try, no problem. although the miss seemed to be worse afterwards and it runs a lot rougher. any specific leads would be really appreciated.