P0301 Fault - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > First Generation Faults & Fixes


First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

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
Restraint System Fault Richard of the Hills Second Generation Works 0 Oct 10th, 2013 11:39 AM
Ubiquitous airbag fault - tracing actual problem tieak First Generation MINI One 2 Apr 24th, 2013 10:57 AM
Ubiquitous airbag light - tracing the actual fault tieak First Generation Faults & Fixes 5 Apr 23rd, 2013 12:05 PM
Rear Parking Sensor Fault adyp1972 Second Generation Faults & Fixes 0 Apr 8th, 2013 09:14 PM
R56 Cooper S fault codes/ no boost das882 Welcome New Members 3 Mar 27th, 2013 09:45 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old May 9th, 2014, 07:19 PM
richas's Avatar
MINI2 Newbie
Offline
 
Join Date: Oct 2004
Posts: 17
Local Time: 08:07 PM
United States
P0301 Fault

Hi,
I have a 2005 R50 Cooper. A while back I replaced the O2 sensor after I got an error code, can't remember the number but it was "post cat mixture rich" or something. That fixed that problem.

Months later I get a P0301 Cylinder #1 misfire fault. The engine started running rough like it was on three cylinders.

I find a corroded terminal on the coil and so I replace the coil (MSD), wires, and plugs. Seemed okay for a while.

Then it came back. So I moved the #1 injector to #3. This did not help.

I put the old spark plugs back in, no joy.

I have gotten the fault and reset it MANY times.

The typical symptoms are:

The engine may be idling a bit rough, like a partial misfire.

It never occurs when I am on the gas or the highway and I commute 40 minutes each way everyday.

I will take my foot off the gas and the engine will stumble, the light will come on (blinking first), and the car will be running rough like it is running on three cylinders.

Here is an interesting bit, if I turn the car off and restart the problem goes away. Though the idle always seems a bit rougher than it should be.

Not sure what else to do besides try an ECM. ($$$$)

Thanks

Rich
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old May 10th, 2014, 12:04 PM
MINI2 Master
Offline
 
Join Date: Feb 2011
Location: South london
Posts: 1,164
Local Time: 04:07 AM
United Kingdom Male
Hi ya

Get your fuel pressure and flow checked
Also Get a leak down check carried out I think you may have burnt a valve out :-(
Reply With Quote
  #3 (permalink)  
Old May 13th, 2014, 05:23 PM
richas's Avatar
MINI2 Newbie
Offline
 
Join Date: Oct 2004
Posts: 17
Local Time: 08:07 PM
United States
Quote: Originally Posted by marque (original)
Hi ya

Get your fuel pressure and flow checked
Also Get a leak down check carried out I think you may have burnt a valve out :-(

Ordered a Fuel pressure gauge. The next time this happens I will pull over and measure........


Thanks

Rich
Reply With Quote
Sponsored Links
Advertisement
 
Reply


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
Restraint System Fault Richard of the Hills Second Generation Works 0 Oct 10th, 2013 11:39 AM
Ubiquitous airbag fault - tracing actual problem tieak First Generation MINI One 2 Apr 24th, 2013 10:57 AM
Ubiquitous airbag light - tracing the actual fault tieak First Generation Faults & Fixes 5 Apr 23rd, 2013 12:05 PM
Rear Parking Sensor Fault adyp1972 Second Generation Faults & Fixes 0 Apr 8th, 2013 09:14 PM
R56 Cooper S fault codes/ no boost das882 Welcome New Members 3 Mar 27th, 2013 09:45 AM

» Recent Threads
Need help with part numbers - CV boots for right front axle MCS
Jul 5th, 2014 11:09 PM
Last post by David.R53
Today 02:19 AM
1 Replies, 289 Views
Northeast Track Days 2014 Schedule
Mar 13th, 2014 03:36 PM
by NTD
Last post by NTD
Today 01:06 AM
10 Replies, 1,108 Views
Northeast Track Days
Apr 25th, 2014 01:09 AM
by NTD
Last post by NTD
Today 01:03 AM
5 Replies, 861 Views
Mini One R50 from Poland
Yesterday 05:35 PM
Last post by ilovecables
Today 12:23 AM
2 Replies, 154 Views
Steve McQueen's Mini Cooper S
Yesterday 10:45 PM
by mab01uk
Last post by mab01uk
Yesterday 10:45 PM
0 Replies, 99 Views
fan starts as soon as engine starts
Yesterday 02:45 PM
by 4x4mini
Last post by 4x4mini
Yesterday 10:14 PM
2 Replies, 159 Views
Newbie question for R53 JCW owners
Jun 11th, 2014 01:06 PM
by Chuck21
Last post by Marshalliom
Yesterday 09:55 PM
1 Replies, 566 Views
MINI Superleggera Concept is a Modern Day Classic
May 26th, 2014 11:44 PM
Last post by Marshalliom
Yesterday 09:47 PM
6 Replies, 2,040 Views
air con not working 2010 cooper mayfair
Yesterday 06:10 PM
Last post by shighter
Yesterday 06:10 PM
0 Replies, 128 Views
Back Up Light stays on
Yesterday 05:26 PM
Last post by Charlie74
Yesterday 05:26 PM
0 Replies, 127 Views
Thought I fixed it but it's still broke down
Jul 24th, 2014 09:31 PM
by Dolf
Last post by Dolf
Yesterday 05:21 PM
2 Replies, 287 Views
Has anybody chipped/re-mapped a petrol countryman one?
Yesterday 04:52 PM
Last post by Warriorbez
Yesterday 04:52 PM
0 Replies, 132 Views
Flat Spot - What to Check Next?
Yesterday 04:20 PM
Last post by bargeemark
Yesterday 04:20 PM
0 Replies, 130 Views
Question about hood replacement
Jul 24th, 2014 08:25 PM
Last post by drozd
Yesterday 04:13 PM
2 Replies, 227 Views
jl audio CS112LG-TW3 will it fit?
Jul 24th, 2014 06:38 PM
by erictye
Last post by erictye
Yesterday 03:47 PM
2 Replies, 277 Views
MPG Mini Cooper s
Jul 21st, 2014 01:50 AM
Last post by Marshalliom
Yesterday 03:22 PM
5 Replies, 600 Views
Storage behind rear lights
Yesterday 08:12 AM
Last post by ScreamMini
Yesterday 02:48 PM
4 Replies, 214 Views
Central locking interior switch - fault or design?
Yesterday 08:35 AM
Last post by ScreamMini
Yesterday 02:43 PM
3 Replies, 225 Views
Cooper D reving faster than engine speed
Jul 23rd, 2014 09:37 PM
Last post by The Nun
Yesterday 02:31 PM
3 Replies, 402 Views
Noisy fan. Temp sensor?
Jul 16th, 2014 06:59 PM
Last post by Green-chameleon
Yesterday 12:40 PM
1 Replies, 313 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 03:07 AM.



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