have this skoda with the skoda engine with a flat spot , fault code relating to the throtle potentiometer,checked on live data and multimeter with throtle clsoed I have a 4.9 volts and goes down with throtle opening to only 4.7 volts. Do these throtle pots start with a high volts and drop down when you open the throtle. this unit looks like a all in one with stepper motor as well and looks expensive. ray