Here is the link that I started it at, Hope anyone here can me help this guy out with his Z

http://www.hybridz.org/ubb/ultimatebb.php?ubb=get_topic;f=12;t=000583

If he hasn't replaced it already I think I would start by trying a different coil. It sounds like something between the coil and distributor if it isn't the bad ground. Either that or it's in the wiring (corroded or loose) connections on the coil or on the distributor itself. Just a couple more ideas to check out.

Thanks for the help so far everyone as been pointing to the same problem. It's either a problem with the distributor, bad ground, or corrosion. He might sell it if he can't fix the problem. I'll let you know what happens