R56 Mini First (1.4) lumpy idle - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > Second Generation Faults & Fixes


Second Generation Faults & Fixes MINI faults and fixes Late 2006 - Present

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
Mini HQ - Terrible ethics for the customer. jobforacowgirl Dealership Feedback 11 May 22nd, 2014 05:36 AM
R56 Mini Cooper Erratic surging at idle from cold start Norfolk-Mini Second Generation Faults & Fixes 6 Mar 13th, 2014 03:12 PM
Brooklands Mini Day Sunday, March 24, 2013 mab01uk Mini Events 11 Apr 5th, 2013 06:11 PM
2006 1.4 Mini One D Idle Knocking Noise Just purchased. quemlar007 First Generation MINI One D 0 Mar 4th, 2013 08:20 PM
Mini Australia service chilld Dealership Feedback 4 Sep 4th, 2012 05:29 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Feb 27th, 2014, 09:31 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 3
Local Time: 07:41 AM
United Kingdom
R56 Mini First (1.4) lumpy idle

My wife has a 59 plate Mini First which had elevated HC readings at the last MOT, but the re-test just scraped under 200 ppm.

Her Mini has started idling lumpily (~650 - 700 rpm) and sounding a little raspy at low revs (< 2500).

I stuck my OBD cable on this evening and the o2 sensor seemed to be reading < 1v which seems a little low to me, I was expecting >= 1.5v (see attached*)

After reading h t t p://w w w.mini2.com/forum/second-generation-faults-fixes/206833-mini-failed-emissions-test-second-time.html I'm tempted to get some cleaner for the cat, but are my o2 readings out of whack or am I miss-reading them?

(*columns are: PID, sensor, current reading, units, min, avg, max)
Attached Thumbnails
Click image for larger version

Name:	Screen Shot 2014-02-27 at 22.05.45.png
Views:	29
Size:	32.8 KB
ID:	169954  
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Mar 5th, 2014, 01:15 AM
MINI2 Newbie
Offline
 
Join Date: Mar 2014
Posts: 1
Local Time: 07:41 AM
United Kingdom
United-Kingdom

Had a similar problem with our 2007 1.4 R56 70k miles which seems to be fixed now.

There were no OBD fault codes but we had a lumpy idle and slight hunting up and down with a flat spot at 2k-3k rpm and CO and HC emissions were both above MOT test limits.

It was time for a service so it had an oil change with new oil, air and fuel filters and a new set of plugs - which did not improve things.

We checked for an unmetered air intake leakage. Nothing found.

Next the throttle body was given a thorough internal clean. RESULT! - the CO reading reduced by 75% and HC's by 60%, well inside the MOT requirement.
It idles much better now and the flat spot disappeared.

I hope this helps with your problem.
Reply With Quote
Thanks for this post from:
  #3 (permalink)  
Old Mar 16th, 2014, 04:42 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 3
Local Time: 07:41 AM
United Kingdom
Update

Thanks for the advice

Finally got a good enough day with some spare time to have a spanner...

Replaced the air-filter and went for a run out; the car ran less lumpily, but ended up with a P1111A being thrown, so I think I need to clean the lambda sensor (and the throttle body while I'm doing it) and see if that makes things better
Reply With Quote
Sponsored Links
Advertisement
 
Reply
Tags: ,



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mini HQ - Terrible ethics for the customer. jobforacowgirl Dealership Feedback 11 May 22nd, 2014 05:36 AM
R56 Mini Cooper Erratic surging at idle from cold start Norfolk-Mini Second Generation Faults & Fixes 6 Mar 13th, 2014 03:12 PM
Brooklands Mini Day Sunday, March 24, 2013 mab01uk Mini Events 11 Apr 5th, 2013 06:11 PM
2006 1.4 Mini One D Idle Knocking Noise Just purchased. quemlar007 First Generation MINI One D 0 Mar 4th, 2013 08:20 PM
Mini Australia service chilld Dealership Feedback 4 Sep 4th, 2012 05:29 AM

» Hot Topics This Week
New Online Magazine for Track Day Enthusiasts - (21 replies)
Warning lights - (18 replies)
Carbon build up on inlet valves - (15 replies)
heat problem - (13 replies)
ABS Sensor - (13 replies)
» Recent Threads
R50 Problems, how common?
Aug 10th, 2014 11:08 AM
by aypea
Last post by dsakko
Today 06:16 AM
7 Replies, 751 Views
Thought id play with lights coz I was bored
Today 01:54 AM
Last post by NottsaboutMINI
Today 01:54 AM
0 Replies, 78 Views
What is this sound? R53
Today 12:04 AM
by gmb
Last post by SteveAus
Today 01:42 AM
1 Replies, 89 Views
Warning lights
Feb 25th, 2010 04:52 PM
Last post by Dave Elliott
Yesterday 11:28 PM
18 Replies, 6,685 Views
Runflat Light On?
Mar 31st, 2010 08:05 AM
by AlanJCW
Last post by Dave Elliott
Yesterday 11:26 PM
7 Replies, 1,595 Views
ABS Sensor
Apr 8th, 2010 09:58 AM
by Sealsey
Last post by Dave Elliott
Yesterday 11:25 PM
13 Replies, 6,455 Views
All wheel spin related warning lights are on after wheel bearing replacement
May 12th, 2012 11:29 PM
by suvnot
Last post by Dave Elliott
Yesterday 11:17 PM
9 Replies, 2,698 Views
Hey admins!
Yesterday 11:32 AM
by doxbike
Last post by timp
Yesterday 08:28 PM
4 Replies, 205 Views
2006 R53 vs 2009 R56
Yesterday 06:23 PM
Last post by Caveman
Yesterday 07:05 PM
3 Replies, 154 Views
Spare key question
Yesterday 05:31 PM
by moblies
Last post by moblies
Yesterday 05:31 PM
0 Replies, 128 Views
Cannot see video or album artwork on visual boost
Yesterday 03:33 PM
by rich345
Last post by rich345
Yesterday 03:33 PM
0 Replies, 107 Views
R53 Cooper S starting issues.
Yesterday 03:14 PM
by D8DEL
Last post by D8DEL
Yesterday 03:14 PM
0 Replies, 125 Views
57 Cooper S boot and passenger door
Aug 23rd, 2014 01:07 PM
Last post by **KOOPERS57**
Yesterday 03:14 PM
4 Replies, 507 Views
2015 Countryman
Yesterday 12:59 PM
by Sophia7
Last post by Sophia7
Yesterday 12:59 PM
0 Replies, 135 Views
What is this sound? R53
Yesterday 10:01 AM
by gmb
Last post by gmb
Yesterday 12:09 PM
2 Replies, 184 Views
2013 Hardtop 110v outlet
Aug 30th, 2014 06:33 AM
Last post by timp
Yesterday 09:16 AM
6 Replies, 367 Views
Jcw seats
Yesterday 09:02 AM
Last post by Kbizzle84
Yesterday 09:02 AM
0 Replies, 143 Views
MINI Reveals New Turbo 3-Cylinder
Sep 30th, 2013 12:03 AM
Last post by MaryJRuiz
Yesterday 06:52 AM
4 Replies, 8,267 Views
Vibration from steering wheel and braking
Aug 20th, 2014 04:02 PM
by MiniBoi
Last post by CCroker
Aug 30th, 2014 02:17 PM
4 Replies, 518 Views
Halo Hedlights??
Aug 29th, 2014 04:25 AM
by dsakko
Last post by Angib
Aug 30th, 2014 12:42 PM
6 Replies, 396 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 07:41 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2