Just get rid of it all. I pulled my EGR with the Plenum off and Battery out, wasn't really THAT difficult, took a couple of hours altogether. I bought a stubby spanner (12mm I think?) from supercheap to undo all the bolts where the long EGR pipes to the plenum connect with the EGR. None of these bolts were overly tight on my car so they came off pretty easy. The Hard part was the large nut on the Exhaust manifold. I drowned it in WD40 and with the battery out managed to get it undone with a large shifter after much swearing and skinned knuckles. Some people cut the pipe at the nut and put a socket over the nut, this should work too. I then unbolted the EGR from the lower plenum and pulled it straight out the top with the Pipe to the manifold still attached to the valve. Also I had to remove one of the metal hard pipes that the heater hoses attach to to give room to get the valve out.
The EASY way to "delete" an EGR valve is to block the vacuum line going to the EGR valve. If it can't open it won't work. A deleted or malfunctioning EGR will cause high combustion temperatures & high NOX readings.
for the record mr plod was more worried that I had put a twin throttlebody setup on my car than looking for the egr (which was deleted) in the end he defected me for the turbo timer as he did not have any idea what he was looking at in the engine bay. eg points at 2 tb's I say stock, like the 2 turbos and 2 intercoolers. points at other random painted parts I say stock.... they all were, he however missed the MBC and the pod filter. and the weeping solenoid on the rack. the weeping oil outlet on the turbo (yes I was lazy but they were only just weeping not dropping oil on the ground) missed the 95mm to the chassis rails, missed all sorts of legit defectable stuff to go for the stupid crap he has no idea about.
I'm a bit late to the party but I posted up a guide on tapping the plenum to seal them up a while ago. http://www.aus300zx.com/forum/showthread.php?t=327660
