I recently had a FlowMaster performance muffler installed in this unit and it sounds and runs awesome. The vehicle has all it's power and then some. My problem is after the performance shop installed the muffler, the check engine light comes on. I haven't had the time to take it back to the shop, but the mechanic stated the O2 sensors are no where near the muffler he replaced. He did offer to look at it though to verify if the connections are OK. I'd just like an opinion (objective) if there really is a possibility that replacing the muffler could have damaged any of the four 02 sensors. Thanks in advance for your help.
Sep 10, 2009 at 12:40 PM