Maybe THATS why my EGR is still original and never been cleaned or given me grief!
Hmmmmmmmmmm give it another few thousand miles and i will soon be able to tell you as ragging the nuts off mine most of the time also should mean i wont ever need one again.
Oh and mine rev's round cleanly to 4500rpm too.
Oh and servicing every 20,000 give or take a few thousand here and there, oil and filter and fuel filter when i feel like it.
Apart from that it doesnt get touched!!