Hi I have a 2012 vw cc sport and I've been having problems with it been going to shops to shops for help no one can't seem to help me one mechanic told me i needed a tune up so i got that done coil pack and spark plugs then i got the fuel injectors done and just got the the o2 oxygen sensor upstream done and its still jerking when i pressed the gas its running too rich and misfiring and also rough idle