I have a 2000 ZR2 with 193k mi. the truck runs great most of the time but has started missing I first notice that tac starts bouncing and then comes the engine miss. It is getting to the point that it is going dead but so far has not failed to start back up. I believe it is electrical, maybe the coil, dist. Is it likely one or both is the reason? If i am lacking info to help please ask and i will give more if needed. Thanks, papajim