Cayenne air vent and engine smoking
 

My wife started her 2004 Cayenne S and it started smoking out of the air vents and it was smoking in the engine bay. She shut it off. When i arrived to check the car out it started fine and ran fine. it did not overheat. It has no warning lights. Any ideas?! Oh she says there was a pop when just when it started to smoke. It is a 2004 Cayenne S with 150K on the odometer.

Cracked coil maybe? Not sure about the smke though, what did it smell lke?

Wasn't there when they smelled it but they said it smelled electrical. Car is running fine now though. I had the coils replaced 30K ago and they are supposed to be good for 100K. I have had the experience of bad coils. I guess I could check the voltage on each one to see if they are all still working.