My 1990 Lumina with 3.1 won't restart until the engine cools. Car runs great but from time to time it won't restart after being run until it cools down. Any hints on what the problem coul be?
Hi, the problem your having is going to be with the oxygen sensor this only starts working when the car is at running temp so this is when you start getting problems but when the engine and exhaust are cold you will have no problems starting the car.
The oxygen sensor (lambda sensor as its proper name) runs from the exhaust either before or after the catalitic converter if your car has a cat it goes from the exhaust and the other end plugs into an electric connector these are not to expensive to replace and can be done yourself if you have a good mechanical mind to know what your looking for.
Let me know if you need further assistance ok
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