Hi i own a mondeo ST220 2007 V6 model. Just recently it has started to run really badly.. Whilst waiting at lights or waiting for it to warm up the revs seem to be going up an down on the car and its like its losing power...Also a good few months ago it started to make a very loud wurring sound i took it to a few garages one being Ford itself and they advise me as to buy this certain part it but it turned out it wern't that anyway. It has left people ( mechanics ) baffled... Does anyone out there no what this could be it's only done 30.000 on the clock

 

have u checked the breather hose under the intake manifold had the exact same on my st220 at 31k miles

 

Just told my other half now and he's going to have a look at it as we speak lol can see this being a long one lol ...Were due to travel down plymouth in a couple of weeks so I'm hoping its going to be running smooth as i really don't want to be stuck at the side of the motorway Thank you

 

He's just checked it now and it may be that as it was corroded slightly , gunna visit fords tomorrow and order a new one !! Thank you

 

The wurring noise is the idel controll valve ( moosing problem) if you google st220 moosing problem you will see what i mean, its a very easy fix so dont worry