The difference is that one runs by an electronic solenoid and the other is run from engine vacuum. Yes, it can be cleaned. Just remove it from the intake and clean the carbon out. I have used carb cleaner to clean them. Also, make sure nothing is blocked with carbon in the intake (where the EGR mounts). If you do any cleaning in or around the electronics, make sure to use an eletronics cleaner.
Monday, January 6th, 2014 AT 8:34 AM