I have the same issue,loss of power no matter what gear,and just "chugs". Only seems to happen once the engine is warmed up!
Got so bad along with an awful smell that i pulled over and rang the RAC,they put the computer on to test and it came back with it being a fault with the
. So i went and bought a new
for £73,fitted it and it still happened!
So i'm now £73 worse off and no nearer to sorting the problem out,any ideas would be gratefully received.