This '84 would not want to start after it has warmed up and stopped.  This happened three times now and even though I have a Digitool for it, which tells me that every item is working well, I am still baffled about what maybe giving trouble.  I have unplugged the O2 sensor also.  
The thing is, that it starts eventually and then it works fine until it won't start again.  Unpredictable.  It needs about twenty minutes to start again.  
It's a puzzle.
Anyone has an idea?
I appreciate any help.
Zoltan