hey whats up guys i need little input on this. i have been hearing a tapping noise that is coming from EGR VACUUM CONTROL VALVE. it is located on upper intake manifold by rear left corner if standing front of the car. It only makes the tapping noise at idle and if you gave little gas it will disappear also if i turn off the car for 15 mints turn back on it goes away. and then after driving it comes and does the same thing again. i was wondering if you guy help me if you have notice similar noise coming from the same sensor. Next time if it does it again i will try to unplug the sensor and see if it goes away most likely it will. here is the pics of the sensor.