Blocking the EGR Valve

[the evil twin]

Wouldn't have clue bud. Not real familiar with the crd's.

They are part of the Di's , you won't find them on the CRD's.

The CRD's have a completely different EGR system to the Di

Di's use 3 electrically operated vacuum ported solenoids (as shown in his piccy) to control the EGR and Throttle valve for 1 of 4 settings

As well as having water cooled EGR the CRD's use an electrically driven motor wired to the ECM to position the EGR valve which is fully variable.
The EGR on the CRD's is much more responsive and significantly less likely to produce boost spikes.

Bottom line tho, is you are still 'breathing your own farts' as was so aptly put the other day so, yeah, just block the sucker