I am the proud owner of YW03 EAC, a 2003 MINI Cooper S JCW
Stage 1 Tuning.
I bought it for £5k back in May.
It has developed some problems since I have been using it. It has definately lost power. I drove a new MINI Cooper s Coupe and it seemed to have more power than mine.
When I put my foot down, all the way down, the car stutters during acceleration. Seems to happen more in the lower gears (esp 2/3), and when the engine is hungry for fuel. I thought it was a fuel line issue but now I am going pack to misfires.
Over about 4K revs, sometimes 3.5 sometimes 4.5 it makes this nasty hmmm grinding noise. It's a screeching grinding noise. You can let off the gas and make the noise happen at a higher rev range, so its not at a a fixed rev. But it doesn't happen until the higher end. The noise comes from that fan belt area to the left of the s/c.
It has 76,000 miles on it.
HOPE YOU CAN HELP!