Lumpy cold running

[DavidLScott]

My wife's 03 Cooper has a Bluefin upgrade (from about 3 years ago).

Over the last few days, until it is warmed up, it keeps stalling. It has never done this before, even in comparable cold weather. It runs perfectly Ok when warm.

Any ideas anyone? It's a but lethal when pulling out of junctions as you might imagine.

I may try reinstalling the original map and see what happens but the weather is warming up now so it may not be a true comparison.

[Tif_1981]

Maybe oxygen sensor is playing up. Think it gives lumpy idle and can cause stalling problems. Probably not a result of bluefin, just something that seems common to go wrong.

Maybe post on mini2.com and see what comes back

[DavidLScott]

I've swapped back to the original map and it still does it.

Booked in for look see next week but it is still perfectly OK and driveable once warm (half a mile or so).