Dodge Spirit Heater Not Working

Ok. So I Have A 94 Dodge Spirit 6 Cyl, I Am Not Sure How To Explain This So Bare With Me, When The Cars Running Smoke That Smells Like...

My Dodge Spirit Is Running Up And Down In Temperture As It Is Going On The Highway Idoling It Stays Normal Their Is No Heat When It On...

Our Car Has No Heat. We've Changed The Thermostat; Checked The Rad, It Is Full; Changed The Rad Cap. When The Fan Kicks In And The Gauge...

Blower Works But Only Get Warm Air. Have Replace Thermostate And It Works Fine. How Do I Check Vacuum Control Valve Or Entire Heater...