Hi, my car was running perfectly until there was a leak in one of the hose that carry coolant. Its been 3 months since I actually drove the car. This morning after getting the hose fixed I drove it to work the the heating is fine. Every thing seems fine it's just that every time I stop at the lights the engine switches off. Also when I slow down to make a turn the steering wheel stiffens and the car stops momentarily. I have no idea what's going on. Please help me. What do I do ?