Quote Originally Posted by quicksand500 View Post
If you can catch the few messages earlier can you answer the question relating to the solenoid operation and butterfly?

Cheers.
Sorry, I don't fully understand the zd30 egr system, to answer why you cant just keep the valve shut instead of inserting a blank.

These are just blind guesses...
Maybe the ECU will see the valve shut and throw out a limp triggering error?
Maybe if you remove vacuum from it, the valve remains OPEN and not closed?

Personally, Id be solid blanking it with a plate. 5 minute job...

BUt now i am abit confused. Photos you posted to me "looks" like its a CRD motor.
However... As far as I'm aware the CRD has a electric egr valve NOT vacuum operated. I used to own 2009 CRD and the valve began failing after a while because I could hear the whirring of the valve motor after motor shut off.
There was someone on the forum here recently with a failed egr valve, which was electric.