anyone know why my 86 ford ranger runs great all winter ----no problems! When it gets in the 80's or above it starts to buck and wants to die.After it cools down out it runs great--then starts all over again What to do :(

 

A little more about your truck would help us diagnose the problem. But most likely it is overheating since that is pretty much what you said.

And this shouldn't be in the announcements section.