I have a question that is just boggling my head... I recently purchased a K&N air filter for my '05 G6. When I installed the filter I took my car for a test run and noticed that the car would jerk shifting into different gears. I also noticed my "check engine light" came on. I was wondering if anyone else had this same problem, if it is a common problem (or even a problem at all) and what I can do to eliminate this problem?