Poor low idle, hesitation on acceleration when turbo on boost and poor mpg. Changed lambda as wiring was slightly melted from manifold. Car seems to be overboosting as it stutters only in 3rd, 4th and 5th between 3000 and 4500-5000rpm. I can't see actuator properly as it's under manifold so I ordered a used focus RS one to put in as I think they're the same but a pal said may be map sensor. No boost gauge ATM though so not sure exactly what boost does when it stutters.