Swupp and out ?????

Hello to each other I need a hot tip from the Mazda community?? I have flown a 323 bf 1988 85 ps. Condition is pretty good! Very clean little rust. But………….now comes ?? Putting off start everything great ?? exactly 1 minute later ignition current off.?? One day waiting again super ca ne minute, popping off. Temperature sensor can it almost not be because it takes some 2 days until he gets juice again. Has such a thing ever had or a guess ? Like ( yes there was 1988 this plug ?? down left which was always full of oil or something )?? Would I be very pleased if someone could help me further. Greetings of the Micah