Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Clubman (R55), Cooper and Cooper S(R56), and Cabrio (R57).

Engine stumble in cold weather

  #1  
Old 05-17-2019, 10:06 PM
Xjsf28
Xjsf28 is offline
1st Gear
Thread Starter
Join Date: Feb 2019
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
Engine stumble in cold weather

I've recently posted a thread about this issue with no solid answer, I've confirmed that my car was built post 03/2012 so it has the newest hpfp however all of my symptoms (misfires, backfires, cel and stumble/stalling) are all pointing in the direction that I need a new hpfp.

I have a jb+ and aem cai in the car if that changes anything. Ive noticed that it only acts up on cold days also.

Have their been many claims of the newer Bosch hpfps failing?
 
  #2  
Old 05-17-2019, 11:17 PM
squawSkiBum
squawSkiBum is offline
Moderator
Join Date: May 2012
Location: San Francisco Bay Area
Posts: 1,563
Received 191 Likes on 162 Posts
How many miles on the car?
What codes are set?
Have you changed the plugs, and if so with what?
Have you tried disconnecting the JB+?

I haven't heard of any failures on the new pump, doesn't mean it can't happen though. Suggestions:

1) Check realoem.com with your VIN to be sure you have the new Bosch HPFP,
2) check the fuel pressure with your favorite scan tool
3) it could be ignition related, so a scan for whatever codes are set will help narrow down the problem.
 
  #3  
Old 05-17-2019, 11:53 PM
Xjsf28
Xjsf28 is offline
1st Gear
Thread Starter
Join Date: Feb 2019
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by squawSkiBum View Post
How many miles on the car?
What codes are set?
Have you changed the plugs, and if so with what?
Have you tried disconnecting the JB+?

I haven't heard of any failures on the new pump, doesn't mean it can't happen though. Suggestions:

1) Check realoem.com with your VIN to be sure you have the new Bosch HPFP,
2) check the fuel pressure with your favorite scan tool
3) it could be ignition related, so a scan for whatever codes are set will help narrow down the problem.
The car has approximately 78000kms on it. These are the codes I got from a local shop:

2EFF: COMBUSTION MISFIRE, CYLINDER 1
2F02: COMBUSTION MISFIRE, CYLINDER 4
2BE9: CYLINDER INJECTION CUT-OUT: PRESSURE TOO LOW
2C01: HIGH PRESSURE FUEL, PLAUSIBILITY PRESSURE TOO LOW

The spark plugs and ignition coils were replaced at the BMW dealer I bought the car from September of last year.

I first encountered the issue a few months before I put in the jb+ however the intake was in when it first occurred. I think its unlikely that the intake would have anything to do with it though.

I can confirm through realoem that my car was produced 03/2012. And are there any good cheap scan tools you could recommend?
 
  #4  
Old 05-18-2019, 02:42 AM
Scudder44
Scudder44 is offline
4th Gear
Join Date: Nov 2015
Location: Malaga, Spain
Posts: 306
Received 30 Likes on 30 Posts
I would do three things before spending any money. Compression test, oil pressure test and timing chain stretch measurement at that mileage.
 
  #5  
Old 05-18-2019, 03:19 AM
njaremka's Avatar
njaremka
njaremka is offline
6th Gear
Join Date: Jul 2016
Location: Connecticut
Posts: 1,354
Received 141 Likes on 127 Posts
If you are getting low fuel pressure warnings, triple check that you have the latest fuel pump. 3/12 was the changeover date, but doesn’t mean your has one...
 
  #6  
Old 05-18-2019, 07:28 AM
Xjsf28
Xjsf28 is offline
1st Gear
Thread Starter
Join Date: Feb 2019
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts

Here is a picture of the hpfp on my car currently

yup i checked again still the same 3/2012 prod. date.

Hmm I didnt think about the timing chain or compression of the engine. Do you think it could possibly be that either of the two are wearing and the cold weather shrinks/expands them to cause these issues?
 
  #7  
Old 05-19-2019, 08:17 PM
squawSkiBum
squawSkiBum is offline
Moderator
Join Date: May 2012
Location: San Francisco Bay Area
Posts: 1,563
Received 191 Likes on 162 Posts
Best option for an inexpensive code reader is an OBD2 <-> Bluetooth adapter (under $20) and the Torque app ($5) on an Android phone. Lots of threads on that.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Miles30
R60 :: Countryman Talk (2010-2015)
10
10-18-2016 02:39 PM
choupette
Stock Problems/Issues
0
01-11-2013 08:54 AM
ALTAPerformance
Vendor Announcements
0
01-16-2007 12:41 PM
savage65
R50/R53 :: Hatch Talk (2002-2006)
38
12-05-2004 11:57 AM
minifletch
Stock Problems/Issues
14
09-24-2003 05:17 AM


Thread Tools
Search this Thread
Quick Reply: Engine stumble in cold weather


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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: