so i have a case of the hesitation blues. the mustang runs like a champ when its cold but once it warms up to operating temp i get hesitation when im cruising. it doesn't hesitate under acceleration, no idling issues, just when its cruising. it finally decided to throw a check engine light too. i took it to advance auto and the obd2 code reader came back with P0156.. which means o2 sensor bank 2 sensor 2. so after doing some digging around on " them interwebs" i see that it might not even be an issue with the sensor but a whole slew of other things.

the other thing i have noticed is a very fowl smell coming from the exhaust. its not blowing smoke of any kind but the smell is pretty bad. like sulfur, rotten eggs, mixed with some bad indian food.

now ive been known to just throw parts at a car and it be the simplest of things and this is a bad habit im trying to break. any ideas guys?