Problem, my car 1988 regal 2.8 engine wont stay running outside ,but I take it inside my garage and it s fine.
The problem could be with the crankshaft sensor. When the sensor is over heated, it will shut off or stall out. That may explain why your 1988 regal 2.8 engine runs fine while in the garage (shade). Contact a mechanic repairs or replacement.
keep it in the garage
car might just love the inside...that car is human ..lol thats funny.