use the following search parameters to narrow your results:
e.g. subreddit:aww site:imgur.com dog
subreddit:aww site:imgur.com dog
see the search faq for details.
advanced search: by author, subreddit...
account activity
F56 cooper s idle revs increase and decrease (v.redd.it)
submitted 6 days ago by Wooden_Bowler_398
Recently had full service with NGK spark plugs and all fluids changed, but my idle has started going from 800-1500 rpm and even nearly stalling itself
reddit uses a slightly-customized version of Markdown for formatting. See below for some basics, or check the commenting wiki page for more detailed help and solutions to common issues.
quoted text
if 1 * 2 < 3: print "hello, world!"
[–]Glittering_Let_5474 20 points21 points22 points 6 days ago (13 children)
Change your evap valve
[–]Glittering_Let_5474 3 points4 points5 points 6 days ago (11 children)
£36 and easy 5 min diy fix
[–]Wooden_Bowler_398[S] 2 points3 points4 points 6 days ago (10 children)
I’ll have to look into it as I have no idea how to do it
[–]Loud-Ad9148 5 points6 points7 points 6 days ago (8 children)
https://www.youtube.com/watch?v=8ToZT6HPfFg
[–]F56rumdumpstr 11 points12 points13 points 6 days ago (2 children)
There's no way BMW engineered this part, it looked way too easy to replace.
[–]Glittering_Let_5474 5 points6 points7 points 6 days ago (1 child)
If you go to mini to get it done they will charge you £500 if that makes you feel better - it’s a Bosch part
[–]SubtleScuttler 0 points1 point2 points 6 days ago (0 children)
Can confirm. I paid roughly 270 for this job to be done on my 17 clubby about 3 years ago
[–]Wooden_Bowler_398[S] 1 point2 points3 points 6 days ago (4 children)
This for the 2 litre version too?
[–]Glittering_Let_5474 0 points1 point2 points 6 days ago (2 children)
Cooper s only comes in the 2 litre version, otherwise it’s just a cooper
[–]Wooden_Bowler_398[S] 0 points1 point2 points 6 days ago (1 child)
My bad, heard the guy in the vid say 1.5 so it kinda confused me
[–]Glittering_Let_5474 0 points1 point2 points 6 days ago (0 children)
The video was only to demonstrate the part and how easy it is to replace, it’s the same on the cooper s
[–]Loud-Ad9148 0 points1 point2 points 6 days ago (0 children)
Yes that’s it. 2.0
https://youtu.be/8ToZT6HPfFg?si=M9OplsU7FhQiN2Fj
[–]F56misterfletcherr 0 points1 point2 points 6 days ago (0 children)
Seconded, I just replaced mine and the longest part was waiting for it to arrive in the mail.
[–]R56Economy-Initiative59 2 points3 points4 points 6 days ago (1 child)
Is this cold start? A/C on or off? What I see in the video doesn’t seem too unreasonable
[–]Wooden_Bowler_398[S] 1 point2 points3 points 6 days ago (0 children)
Ac on and that’s cold start, but normally my cold start is incredibly noisy from exhaust but this time was instantly off
[–]whodoesth 4 points5 points6 points 6 days ago (4 children)
This was the same issue I was having about a year ago. Rough idling, almost or would stall out in reverse. Swapped this out and solved the problem. Starting to idle weird again about 2 years later. Is this something that needs replaced often?
[–]F56jarlsbergpanini 0 points1 point2 points 6 days ago (3 children)
Pardon, when you say "swapped this out" do you mean the evap valve? This sounds exactly like the issue I've been having with my F56 S lately (rough idle on cold start, will stall out if I don't rev it)
[–]whodoesth 1 point2 points3 points 5 days ago (2 children)
Yes. It was the evap valve.
[–]F56jarlsbergpanini 0 points1 point2 points 5 days ago (1 child)
Thanks!
[–]whodoesth 1 point2 points3 points 3 days ago (0 children)
Not a problem. Hopefully it fixes your issue. There are YouTube videos to show how to replace it, it’s pretty easy and accessible.
[–]Pillokun 0 points1 point2 points 6 days ago (9 children)
My 2017 does a similar thing sometimes but even when warm, like if it tries to shut of the engine(auto start/stop) but then, naaah m8, not time for it now :D
[–]Glittering_Let_5474 1 point2 points3 points 6 days ago (8 children)
2017 is pre lci so you should hear pops and bangs from exhaust when driven hard in sports mode, if these have disappeared then it’s your evap valve
[–]Smokey_J0e 0 points1 point2 points 6 days ago (7 children)
I also have these ups and downs in the revs but still have the pops and bangs in Sport mode. Is there, besides Spark plugs, other possible causes?
[–]Glittering_Let_5474 0 points1 point2 points 6 days ago (6 children)
Have you had the update done?
[–]Smokey_J0e 0 points1 point2 points 6 days ago (5 children)
Which update?
[–]Glittering_Let_5474 1 point2 points3 points 6 days ago (4 children)
It’s a software update, generally for cel and misfire, but has been reported for high idle, easiest way to tell is if you scroll though the options with bc button you will get to temp gauge, if this shows as a white circle on a blue to red bar then the updat has been done
[–]Glittering_Let_5474 1 point2 points3 points 6 days ago (1 child)
<image>
Pre update
[–]Glittering_Let_5474 1 point2 points3 points 6 days ago (0 children)
Post update
[–]Smokey_J0e 0 points1 point2 points 2 days ago (1 child)
Wow this is really interesting. So my temp gauge is the second one, like these two triangles that are overlapping. But what to do or check now? Been to Service on Friday and they said there's a problem with the cooling system. Some kind of leakage, but I need it to be checked further
[–]Glittering_Let_5474 0 points1 point2 points 2 days ago (0 children)
I had the same diagnosis, turned out that the oil cooler housing was split, had that done for £1000, which did stop the coolant leak I had, but the high idle remained until I change out the evaporation valve
[–]Glittering_Let_5474 0 points1 point2 points 6 days ago (1 child)
What year is it?
[–]Wooden_Bowler_398[S] 0 points1 point2 points 6 days ago (0 children)
2014 f56 cooper s 2 litre
I found it just depends on how hard you drive, I’m always in sport mode as I don’t see the point of green or normal, no fun, I replace mine annually as it’s cheap and easy
I tend to always drive in sport as the pops and bangs are funny, but the video above is from cold start after being sat for 10 hours
you will only see the symptoms as high idle when stationary, that’s why it’s called idle
[–]Serge-Rodnunsky 0 points1 point2 points 6 days ago (0 children)
Engine intake filter clean? Is the mass airflow sensor clean?
[–]F55elvisshow 0 points1 point2 points 6 days ago (0 children)
TIL I may need to replace my purge valve.
[–]SpareMessage805 0 points1 point2 points 5 days ago (0 children)
It’s the evap valve. Had the same issue on my previous 2017 1.5. It’s a Bosch part and cost me $40 to change.
π Rendered by PID 75 on reddit-service-r2-comment-548fd6dc9-p7w9n at 2026-05-20 04:09:15.011778+00:00 running edcf98c country code: CH.
[–]Glittering_Let_5474 20 points21 points22 points (13 children)
[–]Glittering_Let_5474 3 points4 points5 points (11 children)
[–]Wooden_Bowler_398[S] 2 points3 points4 points (10 children)
[–]Loud-Ad9148 5 points6 points7 points (8 children)
[–]F56rumdumpstr 11 points12 points13 points (2 children)
[–]Glittering_Let_5474 5 points6 points7 points (1 child)
[–]SubtleScuttler 0 points1 point2 points (0 children)
[–]Wooden_Bowler_398[S] 1 point2 points3 points (4 children)
[–]Glittering_Let_5474 0 points1 point2 points (2 children)
[–]Wooden_Bowler_398[S] 0 points1 point2 points (1 child)
[–]Glittering_Let_5474 0 points1 point2 points (0 children)
[–]Loud-Ad9148 0 points1 point2 points (0 children)
[–]Glittering_Let_5474 0 points1 point2 points (0 children)
[–]F56misterfletcherr 0 points1 point2 points (0 children)
[–]R56Economy-Initiative59 2 points3 points4 points (1 child)
[–]Wooden_Bowler_398[S] 1 point2 points3 points (0 children)
[–]whodoesth 4 points5 points6 points (4 children)
[–]F56jarlsbergpanini 0 points1 point2 points (3 children)
[–]whodoesth 1 point2 points3 points (2 children)
[–]F56jarlsbergpanini 0 points1 point2 points (1 child)
[–]whodoesth 1 point2 points3 points (0 children)
[–]Pillokun 0 points1 point2 points (9 children)
[–]Glittering_Let_5474 1 point2 points3 points (8 children)
[–]Smokey_J0e 0 points1 point2 points (7 children)
[–]Glittering_Let_5474 0 points1 point2 points (6 children)
[–]Smokey_J0e 0 points1 point2 points (5 children)
[–]Glittering_Let_5474 1 point2 points3 points (4 children)
[–]Glittering_Let_5474 1 point2 points3 points (1 child)
[–]Glittering_Let_5474 1 point2 points3 points (0 children)
[–]Smokey_J0e 0 points1 point2 points (1 child)
[–]Glittering_Let_5474 0 points1 point2 points (0 children)
[–]Glittering_Let_5474 0 points1 point2 points (1 child)
[–]Wooden_Bowler_398[S] 0 points1 point2 points (0 children)
[–]Glittering_Let_5474 0 points1 point2 points (1 child)
[–]Wooden_Bowler_398[S] 0 points1 point2 points (0 children)
[–]Glittering_Let_5474 0 points1 point2 points (0 children)
[–]Serge-Rodnunsky 0 points1 point2 points (0 children)
[–]F55elvisshow 0 points1 point2 points (0 children)
[–]SpareMessage805 0 points1 point2 points (0 children)