Ok, first thing. I take my car to Tires Plus to have the engine light checked after I had changed the knock sensor and it wouldn't go off. I'm told that the O2 Sensors are bad but they can't tell me which ones to change. All 3 is there story. My only option. I figure they're full of crap after reading some the things on this website of which I am new to. Any suggestions on finding out which one(s) need to be changed. I have the slip from them on the work that they did but no codes are listed. Gas mileage hasn't changed since I got the car at 37K of which is now at 203K. Performance increased after changing the ks.

Next, I heard from someone that the display on the radio could be fixed by a little quick fix but can't find anything after searching 17 pages. Any clues? I need your expertise! :attention

I'm driving 96