the code that showed up today said o2 sensor, top bank (closes to manifold) has anybody had this w/ the effects we are having, wont hardly pull its self when in gear but revs fine in N or P we have installed new plugs and crank gear and timing belt, all timing marks appear to be alined correctly, just dont wanna spend the 140.00 on the o2 sensor if this isnt the problem, I guess im tring to find out what other peoples trackers acted like when their o2 sensors went out, any feed back will be great