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Tick over lumpy, EGR valve?

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GrayUK:
All, hi again.
I have a 2001, Omega 2.2 Petrol.
Tick over is rough, like its missing but not quite, if you know what I mean.
I have done all the normal things, removed all the intake side, cleaned and replaced, along with a new airfilter.
This did not stop it so I replace the plugs… still no satisfaction.
When cold, there is a lot of noise from the manifold, like it is blowing, but this soon goes and is replaced by the uneven running.
On the road it is fine, it is just tick over (600 rpm).
It has been suggested that the EGR valve could be stuck open, (the car has done 206,000) and i am not aware of any changes of this valve.
Is there any advice you can give?
I not, any info or advice for replacing or blocking the EGR valve?
Where exactly is it?
Thanks in advance for your help.

terry paget:
The EGR valve is at the rear of the head, see my recent thread page 7 for pictures.
http://www.omegaowners.com/forum/index.php?topic=142255.90

GrayUK:
Thanks
Unfortunately  i can not see the pictures here, i will check later at home.
Thanks for your post.

terry paget:
Not quite sure why you suspect the EGR valve. On your high mileage car I would first have looked at the throttle. On a fly-by-wire car like the 2.2 you have no idle control valve, as on the 2.0 car, the throttle opening is controlled electronically by the ECU. If the throttle has carbon deposits or gummy residue on it, it may not function well at small openings. If my 2.2 had an idling problem, I would remove the throttle, inspect it, clean it and polish it. If that failed, I would next look at the breather system.

GrayUK:
 :(

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