i dropped off betty for the same symptoms a few weeks ago. i was sure there had to be a leak, but the techs nosed around and found nothing. the service manager then showed me an official SOA letter stating that it is completely normal, as the car is programmed to run super rich in cold weather to minimize emissions and that the smell should fade once the car is warm.
it does go away after the car is warm, so i just leave the vent on interior air for a few minutes. it's a bit of a pain, but i imagine a boost controller, or those running a littler leaner due to a chip or other EMS or BC have a lesser version of the sypmtom.
but i recently threw a
P0440 Evaporative Emission Control System Malfunction Code. most dealers say this is a function of a loose gas cap (however I ALWAYS tighten to 5 or more clicks)
i've also thrown the following codes:
P0442 Evaporative Emission Control System Leak Detected (small leak)
P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
i'm starting to suspect that either the charcoal cannister is faulty, and that i'm not filtering the recirculated fuel vapor properly and they are just too stupid to see it.
anyone else have a comment? i've nosed around in my bay, and the smell on a cold start is stronger over by the intake area infront of the IC, but i'm not sure what the story is here.