I had this reduced power business so often on my R56. It was a nightmare. I reckon I had it seven times over 3 and a half years, and 4 of them were in the last 12 months.
To resolve it in the past, it has required (in no particular order):
- new injector coils
- ECU upgrade
- new fuel pump
- another ECU upgrade
- just resetting as I only had it for another 5 weeks and the engineer said it was logging it as a wastegate issue, but he couldn't see anything wrong. So it'll be someone else's issue now!
I loved my R56, but it never got bored of letting me down. Quite why I've stuck with them for an F56 I'll never know!
F56 Cooper S, Thunder Grey, 17" Tentacle spoke wheels, Manual, Cloth/leather Diamond, Media Pack XL, CHILI, Variable Damper Control, Electric folding exterior mirrors, auto-dimming interior and exterior mirrors, JCW roof spoiler, Chrome line interior, Darkened rear glass, Seat heating, Anthracite headlining, Colour line - glowing red, PDC rear, JCW Steering Wheel.