It is on my friends 92 blazer. She was kinda getting on it a few days ago horsing around with another friend. Shortly thereafter she noticed a dramatic loss in power and it was hard to start. Although it starts up fine now. I checked it out today. It overheats VERY quickly. There is no coolant, so I filled it. When started it kept bubbling, a little water from the tail pipe. She said it usually has white smoke but I also saw blueish. There is a small coolant leak from somewhere. Wasnt able to find it as it runs down the frame. But nowhere near enough to drain the radiator. Maybe a quart leaked out. She said it also smoked under the engine so I think it leaks around the exhaust. Anyhow, I will probally go pull the plugs in a bit and see how that looks. Anything else I can check. Thanks for the time guys.