Well, the cams can be mistimed in about 4-5 different ways.
So as far as the smell goes, it depends on what you're smelling... to determine if it's a symptom. Is it a fuel smell? A rotten egg smell? Plastic or rubber smell?

As far as codes go, MB DOC is right about the throttle actuator...but you never know what these cars will do to try and adjust themselves with mixture/timing to correct emissions codes. Is your check engine light on?

How does the car sound? Does it run smooth all the way through the power band? Is it sluggish at all?

Your engine is supposed to have over 200 horsepower, so it should not be slow or hesitant if properly timed.