flinston

Hi guys! In my c4 2007 1.6 petrol there are some unregular readings from obd reader. Rpm jumps 730-780 , thorttle position is 20 and jumps to 20.29 and at last timming reading jumping all the time between 2-6. I can feel little shakes in car. First thought throttle is dirty. I have cleaned throttle using spray . I was afraid to take whole unit out because I read that it needs to be calibrated after. After cleaning still the same. Does anyone know what could be wrong or what more need to be checked to spot problem?