I dont actually have a Z-car, but am a big fan. What I do have is a 69 Patrol with the stock motor and a distributor out of a 79(I think?) 280ZX. I put this distributor in my Patrol, and it went from barely starting on points to starting by barely bumping the key! Well, I drove it around for awhile like this enjoying the increase in power and everything. But slowly, over time it started getting harder and harder to start! Well, the other day, I started it up to pull it out of my shop. It started with a little coaxing, but it did start and run. I parked it, and tended to my shop. When it came time to pull it back in, it took everything I had just to get it to start. It ran rough, and would only run at about half throttle. Too much more, and it would start afterfiring(I did a search and learned the term on here). So, I killed it and looked around under the hood. I didnt see anything, so I put my other carb on it. It wouldnt even start. I tried putting the original carb back on. No dice. Not even a sputter. I knew the carb needed a rebuild, so I went ahead and rebuilt it. Still no dice with either carb. I tried ether. It was like I was pouring water in there. It just didnt do anything for it. I checked for fuel. I put the end of the fuel hose in a jar and cranked it over. It was producing plenty of fuel. The full carb bowl should have been a good indicator. That, and the fact that the ether wasnt doing any good. I got to looking and found a big split in the vacuum hose running from my intake to carb(dont think it does anything). I plugged it off and tried ether in the carb. Nothing. Replaced the hose. Still nothing. So I decided to check ignition. It is sparking, but I dont know if it is doing it very well. I took off the cap, and found that the little terminal that touches the center of the rotor was gone. So, I put another cap and rotor on. Nothing. So, I wonder if the ignition control module is alright. Since the spark didnt look too terribly strong. I have not ran a compression test, but I figure if its valve timing, Ive got other bigger problems. Especially since its gear-on-gear. Besides, I would think I would hear a difference in the way it runs. I dont think it can jump ignition timing either, but since the distributor is a retro-fit, I dont know. Any suggestions? Any way I can test the ignition control module?