Q&A

It could be many things, unfortunately and without experiencing the problem first hand or being able to do some basic diagnostic tests its hard to say. Is there a Check Engine Light/Service Engine Soon light on? If so a scan tool will be needed to retrieve codes stored in the computer of your car. The codes stored in the computer would indicate where the problem is. You may have a vacuum leak, a bad ignition coil or spark plug or even an engine mechanical problem but it needs to be checked out as the new catalytic converter may become damaged.