Over the past two years Ive been experiancing a hesitation at the bottom of all my gears. It feels like the timimg advance is messing up because it changes performance alot. Sometimes it almost misses and every once and a while it runs better then ever. I can feel something "turn on" and my car hauls ass. Sometimes it just lags unless I give it at least 1/3 throttle. Please help!!! I dont want to go to the dealership!!! I think its either the throttle positioning sensor or my O2 sensor. Has anyone had this problem?? I know its just a sensor but I cant replace them all. :crazyr: