I have a 2000 jetta 2.0... Check engine light came on after car started running bad. It felt life a plug was not firing. I replaced the plug and problem still happens... I checked the codes and it tells me the MAF is faulty and the Camshaft position sensor is bad. car is running ruff... Should I replace the CPS? or should I look for something else??? Would a faulty Camshaft Position sensor make the car run like its only running on 3 cyl???