I have a 1994 oldsmobile achieva. It is running hot. There is a high pitched noise as it idles that sounds as if it's coming from either the manifold or colse to the upper left side of motor. It runs goofy and idles wierd. There is a lil white smoke coming from the tail pipe after it warms up. A puff of smoke came from the back of the motor and the car shut off. I left the car parked till the next day when I started it, the car ran with no smoke from tail pipe but was still warming up. It also didnt shut off and was no smoke coming from motor. Still runs with a high pitched noise. Any help would be greatly appreciated being as I have 3 children and am on disability so I kinda need a vehicle.