Ok.. So, Still not getting heat in my 91 Jetta. Heater core is good, flushed it out, all thed lines in the engine compartment are hot and circulating great, new water pump and thermostat is working. Vacuum lines have good air flow. Thinking maybe the air filter box flap may not be working correctly.. Any ideas?
I have the VW Manual with all the diagrams and trouble shooting but feel I'm missing something simple