Whistling noise, then smoke pouring throught the car vent?
I have a 94 ford explorer. I was driving down the road and all of a sudden heard a whistling noise. I smelled a burning smell, but the engine wasn't anywhere near hot. And then i turned the heat off. It had been on low. The whistling stopped about 10 seconds later. I turned the heat back on and smoke poured into the vehicle from the vents. What is wrong with it?