Hi Daniel and Danny, I've got exactly the same problem on the same car.....seems to have started after clutch change.........I know the wiring harnesses around the battery area were disturbed, so am going to see if re-seating all connectors with WD40 makes any odds as a first try. Will let you know if it makes any difference.. Did you get anywhere your end with a fault diagnosis? With regards Geoff

I'm taking the car in for it's first mot, and have asked them to read the fault codes for me (if it has any stored). They reckoned problems like this in their experience were often caused by the EGR valve sticking, quite often through the car not being driven driven hard enough.

Seems to be a common problem on the diesels anyway, and they suggested blanking the exhaust port off rather than buying new valve/cleaning old one, so I'll let you know how I get on!

Our old van had new injectors, fuel pump and a pile other bits and bobs.Nothing worked and the fault remained. They were on the verge of relacing the vehicle until the ECU was changed and the problem was sorted. After some time it started missing again. By now the van was 3 years old and almost out of waranty. This time the dealer failed to get the van to reproduce the fault until I actually took a mechanic out it. After a whole lot more messing about and eventually taking the service manager out in it, they agreed to replace the ECU again. Fault vanishes again only to reappear a few months later.

The new van has the same problem. It wouldn't suprise me if they all do it to some degree.

The dealer local to me has done the same thing. No faults found. I'm sure its an engine management problem. I will take them out in the vehicle and demonstrate the problem when the weather improves. I have spoken to Vauxhall and they have nothing on record to suggest that this is a widespread issue. Both our vans have done it though. More than a coincidence I think.......

Edited by mark sl on 23/12/2010 at 12:18

I don't know if you are entirely right on that . Yes , dmf can cause that kind of vibration and it will probably get worse over time . Some users at gtc club forum already changed the dmf and clutch without sucess , on the other hand , my 1.3 cdti is still using the first dmf and clutch ..very occasionally i can feel that vibration but isn't definitely getting worse . To try reproducing the vibration , i need to force the engine to run at low rpm (like 1300rpm 4\5 gear) . Im not a mechanic but im not a noob" either . I already cleaned my egr too

Atomix1thinks he knows everything but has not used his head.

Out of balance D.M.F. would cause vibration in all gears at a set speed not at 1800 rpm in 4th/5th.

Just purchaced 2007 astra van. Did not notice vibration on test drive. Or the faint clutch slip (ouch)

New clutch and convert to S.M.F. and guess what! Same vibration. A little less violent i guess due to the fact that it is now single mass so not so many springs. but it is def not the D.M.F. for sure.