ok so i am going to revert toa prev. post i had months ago about my jeep sputering, almost stalling...what ever you want to phrase it. last time i put some injection cleaner in the tank and it stopped. but now its back and cleaner not working, so i thought maybe some dry gas. nothing seemes to help. not at the same time of course, and i cant pin point the cause. so then i came up with the o2. Because i have an exhaust leak before the cat. so i was thinking that would it be possible that the leak is allowing too much oxygen in the exhaust thus giving the o2 a false reading making the engine run too rich making it flood out thus making it run rough or sputter. Any thoughts???