Sir, this review is the first I have heard of a problem after we worked on your car 2 weeks ago. If you are having a problem, please bring the car back to us to take a look. There was a lot of oil spilled on your catalytic converter and will take a while to burn off. There may also be another oil leak that was masked by the enormous leak from the valve cover gaskets we replaced. I am happy to take another look. Please call me tomorrow.