General Tech Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.
Sponsored by:
Sponsored by:

Odd Engine Stalling

  #1  
Old 06-04-2019, 04:11 PM
Zac
Zac is offline
Junior Member
Thread Starter
Join Date: Jun 2019
Posts: 3
Exclamation Odd Engine Stalling

I've had the strangest experience for the last year with my 2014 Mini Cooper F56 with the engine stalling on startup.

The problem begins if I haven't driven the car for several hours. When I start the car and I shift the car out of park RPMs will immediately drop and the engine will rock, revving itself, trying to prevent a stall. The interesting part is that this goes away if I let the car idle in park for about 20 seconds. It get more interesting because this problem is not consistent. Its only when I leave the car for several hours without driving it. Typically my days look like this: I start the car in the AM, let it "warm up", for the lack of a better word, then drive it and all is good. The rest of the entire day, the car doesnt require to be "warmed up".

What i've ruled out is:

- Engine Air Filter
- It's not relative to the AM or outside temps.

Another interesting note: While I let the car "warm up", you can audibly hear the RPMs drop from ~1200 to ~800. When this drop occurs, this is my cue that the car is ready to be driven. When I shift the car into drive or reverse, no problems occur.

Any advice at what this could be!?

Thanks!
Zach
 
  #2  
Old 06-05-2019, 12:03 PM
Junior Member
Join Date: Jun 2019
Location: Tampa, FL
Posts: 17
Default

I'm no Mini engine expert, but that sounds like maybe it's a slightly leaky intake boot? how many miles on the car?
 
  #3  
Old 06-05-2019, 01:08 PM
Zac
Zac is offline
Junior Member
Thread Starter
Join Date: Jun 2019
Posts: 3
Default

Hi Leshrak,

75K, started around 50K.
 
  #4  
Old 06-05-2019, 01:30 PM
Junior Member
Join Date: Jun 2019
Location: Tampa, FL
Posts: 17
Default

Ah yeah, might want to check the rubber intake boot for cracks. It's possibly also a good time to look at replacing other rubber air and coolant hoses, etc., that degrade over time.

here's the diagram for the air intake hoses on the cooper s 2014 engine, you should be able to visually confirm whether they look good or not I think:
https://www.realoem.com/bmw/enUS/sho...diagId=13_1570
 
  #5  
Old 06-05-2019, 01:35 PM
Zac
Zac is offline
Junior Member
Thread Starter
Join Date: Jun 2019
Posts: 3
Default

Wow, thank you so much. Ill make sure to look at these hoses.

What's so strange to me... is that this issue only occurs after a window of inactivity (6-8 hours). It's only after this window, startup is rocky, but can be avoided if I let the engine idle for 20 seconds before shifting into gear. I wonder if the computer could be compensating for a hose leak.
 
  #6  
Old 06-06-2019, 07:59 AM
Junior Member
Join Date: Jun 2019
Location: Tampa, FL
Posts: 17
Default

It's possible, I'm not 100% sure it's that though (just sounds like similar symptoms, at least at first). If it were a bad leak, I'd think it would probably be rough idling at other times as well, but you may be right about the adjustments. I'm just going by my previous experience (on mostly BMW engines)
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
sws1943
2002-2006 Mini Cooper S (R53)
1
08-09-2017 02:09 PM
kat
General Tech
0
12-26-2014 06:12 PM
bamadeb
MCF Help & Suggestion Center
2
08-01-2011 07:53 AM
bwoodward49
07-up MINI Cooper/Cooper S (R56)
0
10-26-2007 05:34 PM


Thread Tools
Search this Thread
Quick Reply: Odd Engine Stalling


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.