Hi guys

Just wondering if anyone can help. I've got a Focus ST 2.5T with running issues.

On start-up it runs fine for about a minute then it starts to run lumpy and won't rev above 2000rpm with the throttle pedel fully pressed. The E.M.L doesn't come on and there is only one fault code saying "random misfire".
The plugs are new and gapped properly and the coils are all working correctly.

Any suggestions and all help is much appreciated.