My 2009 Caravelle TDI 2.5 4 Motion Manual has developed a disconcerting engine vibration. Very noticeable at 1000 RPM but exists at all the time - driving or stopped. The fuel is clean and the fuel filter was replaced but wasn't particularly dirty. If this was a petrol engine I'd say it was a miss - fouled plug or spark lead fallen off.
I'm wondering if anyone has had a similar experience and what was the outcome. The garage has added some injector cleaning product in the hopes it is just a dirty injector.
I'm told the injectors are not easy to test on this engine and expensive to replace.
Any suggestions as to the most likely problem would be appreciated. I saw a suggestion about a DMF causing vibration but have no idea if this engine/manual gearbox combination has such a beast.
Thanks
John