hello ,
i am having countryman JCW 2014 N18 engine and i am having odd behavior when i start the car when it is warm it start and stall and to make i start i need to push the acceleration paddle a little after that it idle fine with now problems , i don't know what is the problem and it didn't happen while cold start ,no error codes
there is another behavior rarely happen sometimes while driving i don't know if it is the same problem , when i am driving and press the brake to slowdown if i release my leg while the car is shifting down i noticed that the car accelerate automatic for 1 sec and return normal again and when i am pressing brake on traffic light and the gear on D when i release the brake the RPM drop and get up again something like hesitation or that the car will stall but it doesn't stall .
thank for anyone that can help me .

 

Maybe high pressure fuel pump, although apparently it is less common on the n18. You can get them repaired despite what mini tell you, search ebay for repairers.

 

i read the high pressure fuel pump readings and there is nothing wrong with its pressure on the scan tool

 

Fuel pump would be a cold start issue, not warm start. My guess would be vanos related, but can’t make a true educated guess without codes…

 

the problem is there is no codes, only o2 sensor and replaced it and now there is no codes but the issue still happening