Smoke from heater vent

What is your question?

Smoke coming from heater vent. Not sure what color. Windshield fogs up. What do I do to fix it? Truck is running rough. Feels like the idle is too low when stopped at a light

What makes this problem better or worse?

Smokes while running and after turned off

How long has your 2000 Dodge Dakota had this problem?

A few days