well for the past couple of days i noticed i had a exhaust leak.. well turns out the bolts that held the clamp for the headers/y-pipe losened u on me..but for the 2 days i drove it like that..i noticed on the second day i was feeling a miss...and when i picked it up tonight i can really feel it..so any ideas why this would happen? and the check enginelight is on but i didnt check it yet...but i am mostly sure its one of the p300 codes..

 

If the leak is ahead of the O2 sensor, the sensor isn't reading the full exhaust stream and is adjusting to what it thinks is reality. So it's messing with your fuel trim and giving you bad ju ju.
WC

 

how long should this last for?

 

ok i driven it to work ( about 35 miles) and it didnt act any better..so i disconnected the battery cause i figured the PCM had to reset...well that didnt help either..so how can i fix it? or reset it?

 

anyone?? really confused here..going to rip the Cap off today and double check to make sure no water got in there...