Need help 1998 Eighty Eight LS 3.8

I need help. I have a 1998 eighty eight LS that shows symptoms of over heating but temperature gage is normal , but shuts off and car will not restart until it cools all the way down. Engine miss fires and backfires and goes dead diesling.

Unplug the vacuum line to your fuel pressure regulator and see if there is fuel in the line or regulator. Sometimes they leak an that will work fine when the engine is cold and needs more fuel but after the engine warms up it floods the engine.

the same thing can happen if your coolant temp sensor stops working. If the coolant sensor stops working (goes dead) the computer will read -40 degrees f. May start ok cold but will flood the engine if the engine is warmed up.

check those things first