TTTTT

 

Lets see if we can get you going on some of these problems. I think problem 1 and 3 are related. As for #2 I am not sure I understand what is going on there so lets leave it for now.

Imo your high speed hesitation is pointing to a faulty coil(s). This also points to your will not start condition when hot. A poor idle can also be the coil(s). I would also make sure I have a good clean air filter. You might also want to look at your plugs and wires. Of course the other thing is the starter which could be going. Electrical parts don't like to be hot and that's when they usually show signs of weakness.

 

TTTT

 

I always say start with the easy things and it won't get any easier than using the recommended fuel. That's one for the memory bank, thanks for posting your solution.