sooo, ac works perfectly, haven't tried the heater ... (yet,) its been hot here in Oregon the last few days and I was rolling around the other day and some smoke stated to slightly roll out the vents but only when accelerating uphill. I am not sure if its an exhaust leak, condensation, my car running rich from a bad knock sensor, or the heater core. I checked the valve cover gasket and replaced the rotor, distributer and cap so I know its not oil burning off the engine. My p10 has had a bad smell in the cabin since I bought it. Smells burnt, almost kind of plasticky. carpet below passenger side is stained... as well as the driver side... anyway how do i diagnose this?