EGR replacement

Hi,

Couple questions about the ever-popular EGR on my 2004 2.0 TDCi!

Mine is currently blocked, mainly because I think my EGR was failing - lots of smoke and EML light on even before blocking. I want to get a new EGR and unblock it to see what it's like, however I'm worried that all sorts of crap will be built up behind the blocking plate - should i try and clean that before unblocking - if so - how!?

Question 2 - my EGR has 3 wires on the connector and I know since about 2005 it had 5 wires. I presume whatever EGR I pick up, it needs to be one for 3 wires and not either 3 or 5?

Thanks for the help!

Pete