Noticed a couple months back that fumes were entering the cabin through the ventilation. This occurred immediately after I had performed some work replacing the powertrain control module, all the ignition coils and all the spark plugs (removing upper intake manifold, etc).
Thought maybe I had not done a good enough job of reattaching fuel lines. Took advantage of some warmer weather today to take a look under the hood. Ran the engine while looking for any signs of leakage. Perhaps I wasn't able to see all the fuel lines, but I didn't see any actual leakage... Now I'm wondering if its possible for gas fumes to be expelling in some other way...
Any thoughts or suggestions would be much appreciated. At this point I'm thinking it might be best to just take it into the shop :(