Newbie with Viano.

Hi all,
Newbie today(didn't know this place excisted) and wonder if any of you guys can help me with the first prob that I have had with my '04 Viano 2.2 CDI,which I've had from new and done 87000 m with no major worries.
When used at 1/2 throttle it drives perfectly-but as soon as you use serious boost
the E/M light comes on and she drops into "limp mode" until you reset by turning ignition off, pause and restart.
Have had diagnostic check which, surprise suprise notes overboost pressure.
Have fitted new air mass sensor(which cured the 316 Sprinter I had) but to no avail.
Any suggestions welcome----I'me p----d off with merc dealers in this country.
I used to travel on buisiness to germany and to those that need telling, they are the real deal-not cheap but get it right first time.

Thanks for time and rant!
John

Check you actuator on the turbo, They seize up on these meaning the turbo overboosts - Its a Variable Vain type turbo which directs the gases over a certain path to increase or decreasethe ammount of boost you get. If this is sticky and cannot react like the ECU is telling it to then it will drop it into limp mode!

Hope this helps!

Hi--Thanks for that Mark. I did notice that the actuating arm and pivot of the wastegate control(?) was rusty. Is this the source of the malfuction ?or is it the whole unit that siezes? Should it be possibe to operate it by hand? when not running obviously. BTW I now realize what you meant re my PM to you

No probs.

If you get someone to start the engine, when your looking at it in the engine bay, it should move as much as the actuator can pull it. Its moving the vains in the turbo. If it doesn't take the actuator arm off the turbo ( Small C clip) and see if the turbo part feels like its moving freely! If it doesn't the there is your problem!

Mark