Hello, I have a 1990 Lumina APV van that periodically after running gets Hot!

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Hello, I have a 1990 Lumina APV van that periodically after running a little while, the Temp starts going halfway up and if I accelerate more heavily it will get really hot! The big problem while driving will happen when I come to a stop. The engine just goes dead sort of like if you can imagine driving a manual transmission car coming to a complete stop and not engaging the clutch....This is how my van feels when it starts heating up and I come to a stop...Then I will have to put it out of gear and crank it, But then when I put it back in gear it will go dead again... If anyone can help me figure out a fix for this I would be so thankful! Thanks!