I love my 1997 pontiac sunfire convertible! had it for three years and have regularly replaced oil and fluids. while driving home from work, i suddenly decrease speed and have to get over to the side of the expressway. I lift up the hood to try to see whats wrong, (mind you im an 18 year old girl with not a lot of expertise under the hoods of cars) and nothings smoking, and my car wont turn over or start. so i wait an hour for help and when it turns over, the motor violently shakes and black smoke comes out the tail pipe! ANYONE HELPPPPPP! suggestions! please! i want to keep this car because its nice no rust and drives very well in snow even though its a light car. HELP PLEASE!