Damn, it sure would be nice to have a Sun distributor machine to diagnose this. I wish I had the money back in the day when they closed our school auto shop.
Wouldn't it though. Back when I was a kid a guy down the street from me had one and wanted $150 for it. I couldn't afford that and If I remember right about a year later his roof started leaking on it and he didn't do anything with it but let it set and rust up then finally through it in the scrap. What a shame.