Distinctive unusual engine noise.

[jjpp2015]

Hi guys,

Apologies if this is in the wrong place/has been previously answered...

I've got a 2016 2.2 custom kombi lwb. 135k on it. Runs great, but I have a 'rumble' at 1250rpm never at any other point. Happens in every gear but only when revs are gently dropping and not on acceleration.

Just wondered if anyone had any ideas/experience of this?

Cheers!