I'd say you are doing well to get 19mpg. I'd say most of us would be pleased to get 19 on short trips.

I would make sure you NEED to replace the o2 sensors before you shell out that kind of cash, those things aren't cheap and it sounds like you are having it done, so that adds up to even more.

Have your codes read, and post again. I would unhook the battery for a while as well and then give it a few days of driving. Then see what your milage and power levels look like.

A gun in the hand is better than a cop on the phone.

98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.