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mini Countryman JCW N18 stall while warm start

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Old Dec 28, 2021 | 02:12 AM
  #1  
Mahmoud Soliman's Avatar
Mahmoud Soliman
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mini Countryman JCW N18 stall while warm start

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 .
 
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Old Dec 30, 2021 | 02:24 PM
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CoolHands
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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.
 
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Old Dec 31, 2021 | 04:51 AM
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Mahmoud Soliman's Avatar
Mahmoud Soliman
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Originally Posted by CoolHands
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
 
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Old Dec 31, 2021 | 05:24 AM
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njaremka
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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…
 
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Old Dec 31, 2021 | 06:25 AM
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Originally Posted by njaremka
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
 
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