AVCS works by oil pressure to the cams, which is modulated by the solenoid?

Assuming the above, if there is an issue with the oil (causing static pressure in the AVCS lines to waiver), the cam position could "float" with respect to a set duty cycle of the solenoid. Obviously closed loop control would try and reduce this error by adjusting the solenoid duty cycle, but if it can not react quick enough to the changes in oil pressure the cam position is not going to be right, affecting the torque and making the acceleration jerky.

I don't think a malfunctioning sensor would cause this kind of behaviour, as it would either read full advanced or fully retarded, meaning the solenoid would be either fully open or fully closed, which I guess would affect the VE of the motor and hence the tune, so I guess it could cause jerky acceleration.

Or am I way off here?

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