I've been getting a code for bank one being too lean(p0171). I only get the code when i am travelling back to school on the freeway. Usually i'll just be crusing about 95mph in cruise control and sometimes the will start bucking and won't accelerate at WOT. Partial acceleration is ok. Also when i put it in neutral it will want to die. this only happens sometimes. One other question, my car shakes a little at idle but when it the temps get hotter it gets worse. Whats my problem?