Hoorah hoorah I fixed it - for free too
Sorry, I must calm down, but this will be helpful to many of you with JTD engines and should probably become a sticky or in the 'how to' thread.
Like many others, my jtd GT had lost power below 2500 rpm and I quickly suspected the EGR valve. I spent an hour or two cleaning out the carbon/soot from the valve and making sure it moved freely. I was sure that this would fix things, but no such luck
Now I don't like to have to spend money unless I really have to, so I looked further into things. Some of you recommended blanking the EGR off, but I read that this could cause turbo issues in time. Others fitted a new EGR valve for c. £100 + fitting and nearly always had success.
So, I figured that the problem had to be down to a fault with the solenoid/actuator rather than the valve itself. I spent hours on the web searching for some more information and eventually found this thread from another forum (Vauxhall)....
how to clean z19 egr valve (proper method) - Vectra C / Signum Owners' Club Forums
This goes into detail on how to fix the root cause of the majority of EGR failures - a siezed solenoid. It's really very easy to do, has saved me some money and resolved the problem altogether. Note that further through the thread there's a pdf of the photos and method for you to save or print as required
Don't bin your EGR fix it