Hi all, I'm having some issues with my 2005 golf gttdi140 bkd, what's happening is I'm getting a heavy judder at low revs, I've had it plugged in at the local garage and the only fault code is the intake manifold flap, they said it wouldn't cause it to judder because it's a anti shudder valve for turning the engine of, I've been reading about and other people have similar propvems and spent hundreds trying to sort it, I've been told it's definitely not the flywheel. Don't know what to do and definitely don't want to get ripped of, can someone please help me😩