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Is the problem my EGR Valve? or something else?

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firstomega:
I have a Vauxhall Omega 2.2 DTI CDX year 2002 Saloon (or could be 1999 as the first reg on logbook says april 2002 but the original reg starts with a V so could be 1999 showroom then first reg in 2002 private plates?).
Anyway, I hope you guys can help me please?
The symptoms: loss of power when driving/ going uphill, EML comes on and off, revs counter drops to zero for a few seconds but still drives, then comes back on just like EML going on and off, sometimes engine cuts out completely like a stall (usually at the worst place on the road :( ), leave it switched off for a few minutes then restart and all okay till next time some kms down the road. Seems to drive much better when cooler weather but when hot weather (30C or over for example) it is much much worse. When I stop if it has been playing up then sometimes white/blueish smoke coming out of the exhaust. Do I need to change my EGR valve? if yes, which one is it as I see many models of EGR valve on car parts sites for my car. How can I know which one to order please?
Please forgive my maybe amateurish description as I am not a knowledgeable mechanic but the local garage wants to charge me 2000 euros to fix it! (maybe they see a woman and assume stuff? or maybe, as I am in France, they see an English woman which is even worse!).... So I thought the best thing is to come and ask you guys as you have always been so helpful and knowledgeable in the past - help please!!!! I love my Omega!

firstomega:
I have been searching all day for this fault.  Now on the forum I find it may be the crank sensor and also how to replace/fix it!
Found here:
http://www.omegaowners.com/forum/index.php?topic=99451.0
and how to fix it here:
http://www.omegaowners.com/forum/index.php?topic=90640.msg1155585#msg1155585
All seems to be correct as the symptoms I had before starting 2 years ago were EML suddenly and loss of power. I was staying at a friend's house so her mechanic came and said he fixed it, charged me 75 euros, had not fixed it. So I got back home 90kms and my partner next day put his hand in blindly (where the mechanic had told me the fault lay) and fiddled with what he thinks is the crank sensor cable. Anyhow his blind fiddling with the cable fixed it for a good long while. Then it started to play up again finally leading to the problems described above in first post above here.
Local garage gave me the following codes:
P1335, P1125, P1631, P0725, P0400.
Local garage then sent me to a diesel specialist who wanted to charge me 58 euros for the computer code check, and a further 81 euros per hour till it was fixed. Diesel specialist said it could  take several days till it was fixed and could not give me a quote as he may need to order parts and see if it fixed it or not, and if not keep ordering parts till it was fixed. Hence 2000 euros bill plus possible.
I have since reading all this on the forum found the crankshaft sensor to buy online (27 euros plus 11 euros delivery charges coming from UK to France) and using the description of replacement here: http://www.omegaowners.com/forum/index.php?topic=90640.msg1155585#msg1155585
can try to fix it (a royal we - my partner will have to try lol..).
But this description where to find the crankshaft sensor etc....will this be good for my Omega 2.2 DTI CDX year 2002 (or 1999 as explained above)?
Dont have and can't find a manual for this car - if could then my partner would have looked for himself to find the issue.
Hoping you guys can advise me?
Does my EGR valve also need replacing?
Thank you all for reading. I love my Omega!
 

Doctor Gollum:
Early Vectra C diesel manual will cover your engine.  :y

Your car is almost certainly a 2002. With the new regulations it is possible to have VO as the first two letters followed by 02/03/04/05/06/07/08/09 etc as the numbers for March-August registrations.

Also, it could be a sensor fault or a loom fault or both, but that guide should see you right as long as you are prepared that the sensor alone may not cure it :y

dave the builder:
It's not uncommon for the EGR and intake to get very clogged with soot on these diesels 
i'd remove and inspect the EGR valve and check the intake
is the EGR electric or vac type ?
early EGR is vacuum controlled ,so could just be a vac leak

firstomega:
Doctor Gollum:  Thank you so much for your kind reply. Yes the original registration plate was V002 - how did you know?!!! :). Any idea please where I can get hold of an early Vectra C manual? If it is the loom as well, do you mean by the loom all the wiring that connects into the engine block? How on earth could I find which wire is playing up in that case? Worried!!!

dave the builder : Thanking you too for your kind reply. I am sorry but I have no idea whether my EGR is electric or vac type.  I have asked a friendly English mechanic about 3 weeks ago but as yet have had no reply from him. How can I find out? If I wanted or needed to change the EGR then I would need to know this to get the correct model. I do know that about 2 years ago the friendly English mechanic put the car on his diagnostic computer (not a very sophisticated one maybe), the fault came back as a vacuum leak. Does that help me to find out? Why would there be a leak? Would that be a hole in the EGR or a rubber perished maybe?
I only have one car (my omega which I love) and in the middle of countryside here in France. No one here to help me (except you guys :).  So, how difficult is it to remove the EGR and then to at least have a look, hopefully try to clean it up, and then replace it - as I can't be stuck without a car and no transport.  Are there any descriptions and maybe with photos on here on how to do this on my car please? Or can you explain please?
Local garage is friendly but no use as telling me they need to change the electric diesel pump and 2000 euros please and diesel specialist wants me to leave an open cheque. So I have to sort this myself - well my partner really who has some ideas and will do the actual mechanic stuff - but I type quicker than him :).
Thanking you both dave the builder and Doctor Gollum

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