I HAVE a 1983 Pontiac Firebird V6. When the engine is hot and I make a quick turn after braking, the engine cuts out as if it has run out of gas. I can always restart the engine. This also happens when I have been driving at high speed and have to come to a quick stop.
Sounds like a fuel supply problem. The fuel could be rushing away from the pickup when you make your quick turn. Check the fuel system from tank to engine.