Hi, I am having an issue with my 2003 Nissan Sentra Spec-V. The engine was vibrating very hard and was not idling properly and I lost ALL power, I have changed the fuel pump, cleaned the injectors, new spark plugs, new engine and trans mounts, and that did not fix anything. I finally did a Throttle Body Sensor re-set and instantly got my idle and power back, but there is still a small vibration to the car that you can feel in the steering wheel and seats coming from the passenger side. My mechanic is certain it is now my balancing shaft chain. I am hoping to get some tips and input on this before I continue to drop more and more money into my Nissan.