hi guys, i have a prob with my st200 thats driving my hubby round the bend now. it feels like a small hiccup under load, not as bad as a misfire, but similar jerky symtoms. replaced plugs lead and coil pack, all of which made a small difference but ends up coming back to the same prob again. also seems to hang back a little at the secondary switching point then shoot off again! had it on the diagnostics by our freind who works at ford and it came up with a fault on one of the knock sensors! our freind has never done these on an st b4 and wasnt sure where abouts they are. any help out there guys with similar prob or know a solution. muchos tanks for any help you can give!