1999 Mazda b4000 6 cyl Four Wheel Drive Manual 77000 miles
It's 20 below 0. I was driving down the highway and the heater started blowing cool air. A strange, musty smell came out of the vent. Now the car is idling at about 2200 rmp when it normally idles at 1200?
The temperature gauge is all the way to the left (cold).