what are using to scan the car with, needs to be good enough system to cover all p-codes and live data on all controllers to stand a chance of working it out.. first off how many miles has car done, if on n18 engines over 70k has the timing chain been checked, i have had a few of them where others have given up after changing all you have to find the real issue chain is stretched and engine is running out of time, this cause the 02 sensor upstream to try and trim the fuelling that is incorrect due to un burnt fuel air mix being dumped on it due to the over lap on inlet and exhaust valves etc,,, i always tell people on these prince engines before throwing money at it guessing you need to know its timing is bang on, as 02 sensors have so much to do with the amount of fuel demanded ie fuel pressure trim,,Hi Guys & Girls,
I am after some help with my 2010 Cooper S N18.
Intermittent EML light
Lumpy idle and jumpy drive
Died while driving (after 5 mins it restarted fine)
Limited boost/ no boost but still drives ok.
Car cut out while driving a few weeks back and now will not start at all.
Scanned the car and it said O2 sensor, Bank 1 Sensor 1 - Sensor Replaced
Scanned the car and I got code P302C "High pressure fuel system, fuel pressure, pressure falls below minimum threshold"
Gutted this had gone wrong - HPFP replaced
Went to start the car and still nothing.. cranking but not firing!
New code P10CF "Rail-pressure sensor, operating range: Pressure to low"
Cannot find anything on this code online!!!
Figured if the high pressure pump isn't being supplied a constant supply and pressure fuel then this would cause it to fail and the lumpy driving/idling.
Took a punt - LPFP replaced
I have so far replaced the High pressure fuel pump and the low pressure fuel pump to no avail!
I am being to lose patience with this Mini!!!
The car was running when it died, was used 3/4 times a week.
Can anybody help and explain what to do next?
the N18 runs same chain kits except for a longer tensioner that was stuck in by bmw to help prolong the point the top guide snaps off and destroys the motor,, in my view its lip stick on a pig should of fitted a duplex high grade chain to fix the issue, so N18 will no higher mileages but means they rarely rattle before going bang so no warning except for running issue,,,
as for 70k that based on a car treated nice and not ragged and not ever let oil level get below half way as these cars do a lot less seen 24k before due to owner thinking it only needed oil when under the min make or red light flickers,, least to say thats all kinds of stupid,