had bassani cat back on and decided to go bassani x o/r. i enjoyed it for a month and decided to put the cats back on after finding that the mil elminators were not working also because there was an exhaust leak. The day i noticed the mid pipe exhaust leak the idle was inconsistant it would not hang at 700rpm or so like normal and when cruising the lower rpm's the car would hesitate when i tried to accelerate. I read around the internet and my symptoms were 02 sensors but i wasnt 100% sure. When the muffler shop installed my catted x pipe they deleted the trouble code. The next day my car was doing the same thing i took someones advice and went with oem motorcraft o2 sensors b/c i could not check the trouble code since the muffler shop deleted it after putting on the cats so i was assuming it was the 02 sensors. well anyway i had the news ones installed and the car is running the same im going to clean the MAF and disconnect the battery (i dont know if this would do anything) but anyway thats where im at. i see alot of people are experiencing a similar problem. Since ive only messed with the exhaust id like to believe its the faulty 02 sensors and that disconnecting the battery would somehow allow the ecu to recognize the new sensors :shrug: dont mean to sound like a fool just looking for fellow advice thank you