Thanks Olley, maybe the old grey matter is not as bad as I thought it was.

cabby

good luck with sorting the problem - if your stuck for a garage -

Las RV has been really good with issues etc that I've had with mine - based just outside northampton

http://www.lasmotorhomes.com/

also - they are great for advice over the phone as well

Hi everyone,
Past on all your input to my friend, and it seems that the PMD unit has been re-positioned and renewed, so that line has been eliminated !
The other possible solution may lie with the electric throttle, which apparently is very specific to this year and chassis, and this is being pursued with the chassis manufacturer, amongst other lines of enquiry.
One thing he mentioned was the potentiometer !!...At this point my brain started to get a bit foggy and my eyes glazed over !!
He obviously has done a lot more exploration of his problem than I was 1st aware of, and it has been ongoing for some 18 months !
Thanks again everyone, I will try and keep you posted as to any progress.

Vinny