Hi all, been forever since last time I posted, but finally getting the time to enjoy my Mini again.

So here my issue, finally decided to get my car on the track and do some racing again (Entire reason I bought my '09 JCW). Took it out last fall and it ran great. Got out to the track last Friday and not so good. Within about 4 laps the power dropped and pulling in the pits uncovered an obvious problem, the intake hose had come of the inlet side of the turbo charger, after cleaning the seal and turbocharger up (oily) i was able to get the hose back on solid, but the "half power" engine light was on and had little to no boost (car ran fine otherwise). After getting back tot he pits after the session I checked for codes using my scan tool (cheapie) but no faults were found, ran the erase anyway and it cleared the "half power" light and the car ran fine (full boost)....for a lap and a half and alas the light came back on. This time there was a p0100 (maf) pending code, took intake apart cleaned MAF wire with some cleaner spray along with the rest of the intake hoses, but third session same problem light back on after 1 lap. I came home cleaned air filter (K&N) erased codes and car runs fine for hours until you go to full throttle mode for more then ~15 seconds then back comes the light.

I'm suspecting that maybe the fuel pump may be weak (car has 160K miles with original fuel pump), but it's too expensive to just start swapping parts and hoping. Anyone experience this issue, or have any ideas. My thought right now is to take it to the dealer hoping they can get a better diagnostic and just not start swapping parts and breaking my wallet.

 

I think you are right about the fuel pump, but also the fuel filter can cause this at high revs/load. Replace both!
Creep mode can also kick in with other faults, like hoses on the bypass valve and the supercharger and a couple others like the pcv.