Wobbly Diesel Engine?

[SteveBray]

I have 150 diesel at two years old and 23,000 miles. When starting up it seems more violent than my other 150's did (2004 & 2007) and a little more reluctant, I am wondering if an engine mount is the problem. Anyone else had anything like this?

I cannot imagine it is a glow plug issue already with the rough starting, having it serviced shortly hopefully it will help. I would also hope the battery is fine too.

[sebadee]

I'm no expert but from what I've read on here so far I would say the dmf is causing the violent wobble but don't hold me to it

[SteveBray]

The clutch feels fine, and the violent wobble is only on startup, is that still a sign of a DMF problem?

[Derek Mc]

I have had two CDTis Vectras now and this one seems a lot more violent when starting but on inspection all is fine tight and nothing is loose so to speak. I think it is possibly nothing to worry about as they do require one heck of a kick to turn them over.

[SteveBray]

Derek Mc I hope you are right, I have booked the car in for a service and once over and hopefully things are fine and if not it is something the warranty will over but probably not knowing how things usually work out.

[snapsnap]

There are two silly little screws that hold the plastic engine casing on. The screws sit in a rubber gromment that eventually wears through and makes the engine casing bang on the side of the metal screws.

Its not violent, but quite noisy on idle. You can easily tell if its the casing causing the noise - just take it off or push down hard on it.

[SteveBray]

Don't think it is anything to do with the casing, the lumpy violent rattle is only at startup and once running for a second or two is fine and no different to any other 150 I have had.

[chewy71]

mine has done this from new

[Aikon58]

I forget the technical way of saying it,i was told that the common rail plays up when cold on the cdti vectra,its to do with the alternator,not that it is broken,but the way it charges and the way the common rail get's it's feed from the alternator,so it might just be a slight fuel pressure problem causing a bit of diesel knock from cold.

[Innes]

Does it wobble on shut down as well? This is a bit of a guess but it maybe that someone has removed the butterfly from the throttle body (althought it doesnt actually control the throttle). I know people do it on the DTI's to improve low-down grunt and I remember an old post by Dieseldog mentioning that he had removed the butterfly from the 1.9 but I cant find the post.

The butterflys job is as an anti-judder device. When the ignition is switched off it closes and stops more air being pulled into the inlet manifold to be combusted. I'm not sure if it effects start-up though.

EDIT: I have found Diesedogs post:

http://www.vectra-c.com/forum/showth...ight=butterfly