This has been a great help.. My car has been suffering from vibrations as the engine drops to tickover (it's an auto) on the move. Almost feels like warped discs but only happens when the revs have dropped. Found my EGR valve really badly clogged up and the intake was the same - Possibly down the PCV being really badly blocked when I got the car. Just soaking everything in Gunk now so the engine can breathe properly when it goes back together
