So I went into the dealer for my tune up and I told them about a jerking from the rear end. So they tested something out and they said my throttle body was bad and replaced it for free under warranty. On the paper it says performed pin point test open circuit in throttle body. Does anybody know what that means? Also it sometimes still jerks a bit but not as often. I have noticed more top end power and a much smoother acceleration especially when slightly accelerating on turns.the car runs like new but I've noticed a little less low end acceleration. Well the point is does anyone know what was wrong with my old throttle body and can I get the car to perform a little better with this one and get more low end like my old one used to do? Maybe recalibration?