R50 loosing power and chugging when accelerating??? - MINI Cooper Forum

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

User Tag List

Reply
 
LinkBack Thread Tools Rate Thread
post #1 of 30 (permalink) Old Jan 26th, 2009, 10:43 PM Thread Starter
Has met Quack Quack Jack
t o t a l m i n i . c o m
 
Deano's Avatar
 
Join Date: Jan 2008
Location: WWW.TOTALMINI.COM
Local Time: 07:46 AM
Posts: 2,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View Deano's Pure Silver & Black 1st Gen MINI Cooper Profile
   
Send a message via MSN to Deano
R50 loosing power and chugging when accelerating???

hey

im wondering if someone can help me out, I have an02 cooper with 96K on the clock, over the weekend i drove over to teeside from belfast, i have driven the MINI all weekend (700 miles) and the car has been perfect, this morning i was starting my journey back to belfast, at this point i had half a tank of fuel left, so i filled the tank and started my journey,

approx 2 hours later i was travelling at a good speed along the motorway when i felt a slight chug from the engine, i thought it may have been a bump on the road and carried on, however i then felt the same thing but harder, so i pulled into the nearest garage for a check, i checked all the tyres, and a quick look over the engine and all looked OK,

since i had no more time to stop i had to carry on driving, however this problem got steadily worse, so much so that everytime i accelerate, the engine looses power for a few seconds and then jolts back again, there are no warning lights and the car seems to be running fine, however this is now happening all the time, making it dangerous to pull out of a roundabout or even overtake a vehicle, its also now happening on all the gears and all different speeds when im accelerating, however it seems ok when im going at a steady speed.

i have been searching and the only thing i can think of is possible dirty fuel? has anyone had this problem before? should i drain the petrol out? or even try the redex fuel cleaner?

thanks for youre help!


t o t a l m i n i . c o m
Deano is offline  
Thanks for this post from:
Sponsored Links
Advertisement
 
post #2 of 30 (permalink) Old Jan 26th, 2009, 10:45 PM
MINI2 Regular
 
Weemann's Avatar
 
Join Date: Apr 2004
Local Time: 07:46 AM
Posts: 195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

England Male View Weemann's Pure Silver & Body Color 1st Gen MINI One Profile
 
dodgy!!!!
er it sounds like dirty fuel yeah!!! did u get it from the supermarket cos they got in quite alot of trouble a while ago when a whole bunch of engines went, i believe....??

Weemann is offline  
post #3 of 30 (permalink) Old Jan 26th, 2009, 10:54 PM Thread Starter
Has met Quack Quack Jack
t o t a l m i n i . c o m
 
Deano's Avatar
 
Join Date: Jan 2008
Location: WWW.TOTALMINI.COM
Local Time: 07:46 AM
Posts: 2,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View Deano's Pure Silver & Black 1st Gen MINI Cooper Profile
   
Send a message via MSN to Deano
Quote:
Originally Posted by Weemann View Post
dodgy!!!!
er it sounds like dirty fuel yeah!!! did u get it from the supermarket cos they got in quite alot of trouble a while ago when a whole bunch of engines went, i believe....??
no, i actually got it in a shell in Yarm! the confusing thing is that i filled up on saturday morning and went on 2 mini runs, it was all fine, and then filled up this morning, at that same garage, and went straight onto the motorway then it happened a while after that? i wasnt too sure if there was possibly bad fuel delivered this morning?

you think i should run it down and refuel it again with super unleaded for a while to clean it out?


t o t a l m i n i . c o m
Deano is offline  
post #4 of 30 (permalink) Old Jan 26th, 2009, 11:25 PM
Has met Quack Quack Jack
Where does that road go?
 
KillerByte's Avatar
 
Join Date: May 2006
Location: Nottingham
Local Time: 08:46 AM
Posts: 12,574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

England Male View KillerByte's Hyper Blue & White 1st Gen MINI Cooper S Profile
           
Send a message via MSN to KillerByte
My Cooper had an issue where it felt like it was tugging back under acceleration. This stopped when I changed the spark plugs. Might be an idea to check those?

KillerByte is offline  
post #5 of 30 (permalink) Old Jan 26th, 2009, 11:39 PM
MINI2 Newbie
 
Join Date: Jul 2006
Local Time: 07:46 AM
Posts: 48
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Portugal
 
Change the fuel filter, check you air filter(made it needs to change), also clean very carefully the manifold air pressure sensor...

I bet that after that and a good quality fuel you car will be back like in the old days!
Innuendo is offline  
post #6 of 30 (permalink) Old Jan 27th, 2009, 06:31 AM
MINI2 Regular
 
matt_croft's Avatar
 
Join Date: Sep 2008
Location: south manchester
Local Time: 07:46 AM
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male
 
is the car still chugging?

could be dirty fuel injectors, try redex on a full tank. super unleaded is supposed to have cleaning properties too, go for shell optimax.
matt_croft is offline  
post #7 of 30 (permalink) Old Jan 27th, 2009, 09:37 AM
still learning
 
Join Date: Feb 2007
Location: near Glasgow
Local Time: 07:46 AM
Posts: 1,268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Scotland Male
 
could be bad fuel due to the fact that you filled up 2 hours before this started happening.........but I would have really expected it to happen sooner after refueling.

could be spark plugs or fuel filters..........when was it last serviced ?
iain cooper is offline  
post #8 of 30 (permalink) Old Jan 27th, 2009, 01:15 PM Thread Starter
Has met Quack Quack Jack
t o t a l m i n i . c o m
 
Deano's Avatar
 
Join Date: Jan 2008
Location: WWW.TOTALMINI.COM
Local Time: 07:46 AM
Posts: 2,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View Deano's Pure Silver & Black 1st Gen MINI Cooper Profile
   
Send a message via MSN to Deano
yeah I'm going to check the car over tonight, it was dark by the time I got home. I have half a tank left so I'm going to run that down and then see how it goes too,

I was thinking spark plugs myself, but it started happenng quite suddenly, it wasn't like it had gradually started over a few days? Is that the sort of thing can happen when spark plugs need changed?


t o t a l m i n i . c o m
Deano is offline  
post #9 of 30 (permalink) Old Jan 27th, 2009, 01:36 PM
MINI2 Privilege Member Has met Quack Quack Jack
PowerSteeringPumpActivist
 
NeuroBeaker's Avatar
 
Join Date: Feb 2007
Location: Behind the wheel
Local Time: 07:46 AM
Posts: 8,410
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Scotland Male View NeuroBeaker's Indi Blue & Body Color 1st Gen MINI One Profile
         
Quote:
Originally Posted by matt_croft View Post
is the car still chugging?

could be dirty fuel injectors, try redex on a full tank. super unleaded is supposed to have cleaning properties too, go for shell optimax.
This is more commonly known as Shell V-Power in the UK: Shell Road Fuels - United Kingdom

Quote:
Originally Posted by Deano View Post
I have half a tank left so I'm going to run that down and then see how it goes
Is that wise? If you're getting abhorrent engine behaviour and you suspect the fuel, would it not be better to dilute the bad stuff with fuel you're confident is high quality? You don't want lasting damage to the engine - so I'd brim the tanks with V-Power, if it was me.

All the best,
Andrew.

NeuroBeaker - Proud owner of Zeus (a 'modestly modified' 2004 MINI ONE).
Helpful Links: [1st Gen. Power Steering Pump (PSP) Failure Guide] [1st Gen. PSP Repair] [Thread Titles] [Adverts Fix]
NeuroBeaker is offline  
post #10 of 30 (permalink) Old Jan 27th, 2009, 02:46 PM
British Racing Dirt
 
AlexBRGCooper's Avatar
 
Join Date: Jun 2006
Location: Sunny Sunderland
Local Time: 07:46 AM
Posts: 579
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Scotland Male View AlexBRGCooper's Dark Silver & Black 2nd Gen MINI Cooper S Profile
 
Sounds quite similar to a problem I was having. I changed the HT leads and solved the problem. Once they were out I could see that moistuer had somehow got into one of them and started to rust the connector. Mine is a 53 plate MC as well

AlexBRGCooper is offline  
post #11 of 30 (permalink) Old Jan 27th, 2009, 03:40 PM
N.O.T.R.A.M.O.O
 
Join Date: Jul 2008
Location: Hill of Knocks. SCO.
Local Time: 08:46 AM
Posts: 140
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Scotland Male
 
This is not a fool proof test, but it is a quick way of checking the ignition system.

The ignition system is under its highest load when the engine is breathing deepest, the easy way of doing this is driving on a quiet road, put it into 5th gear and let the car slow down to the slowest it will run in gear (about 25mph which will be around 800rpm) then floor the throttle.

The engine should pull smoothly throught the rev range, albeit slowly.

If any part of the ignition sysytem is bad, it will show up as missing under this kind of load.

I have changed a few ignition coils recently for this fault, and they show up straight away doing this test.

"Allow me to explain... Understeer is when you hit the armco going forwards, Oversteer is when you hit it going backwards!"
C.Noble is offline  
post #12 of 30 (permalink) Old Feb 10th, 2009, 11:03 PM Thread Starter
Has met Quack Quack Jack
t o t a l m i n i . c o m
 
Deano's Avatar
 
Join Date: Jan 2008
Location: WWW.TOTALMINI.COM
Local Time: 07:46 AM
Posts: 2,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View Deano's Pure Silver & Black 1st Gen MINI Cooper Profile
   
Send a message via MSN to Deano
Quote:
Originally Posted by KillerByte View Post
My Cooper had an issue where it felt like it was tugging back under acceleration. This stopped when I changed the spark plugs. Might be an idea to check those?
asked my mechannic and he said the plugs were all changed in June 08

Quote:
Originally Posted by Innuendo View Post
Change the fuel filter, check you air filter(made it needs to change), also clean very carefully the manifold air pressure sensor...

I bet that after that and a good quality fuel you car will be back like in the old days!
i havent done this yet, but i will do this weekend,

Quote:
Originally Posted by matt_croft View Post
is the car still chugging?

could be dirty fuel injectors, try redex on a full tank. super unleaded is supposed to have cleaning properties too, go for shell optimax.
i flushed the engine with liqui moly injection cleaner, dome a great job on the engine, but this problem has started up again!

Quote:
Originally Posted by AlexBRGCooper View Post
Sounds quite similar to a problem I was having. I changed the HT leads and solved the problem. Once they were out I could see that moistuer had somehow got into one of them and started to rust the connector. Mine is a 53 plate MC as well
my friend has told me to try this, are they expensive to get? or are they easy to do yourself?
Quote:
Originally Posted by C.Noble View Post
This is not a fool proof test, but it is a quick way of checking the ignition system.

The ignition system is under its highest load when the engine is breathing deepest, the easy way of doing this is driving on a quiet road, put it into 5th gear and let the car slow down to the slowest it will run in gear (about 25mph which will be around 800rpm) then floor the throttle.

The engine should pull smoothly throught the rev range, albeit slowly.

If any part of the ignition sysytem is bad, it will show up as missing under this kind of load.

I have changed a few ignition coils recently for this fault, and they show up straight away doing this test.
ive tried this and it all seems ok, the car is fine on short journeys, but then it happens and just gets worse and worse the longer you drive?! its almost like the engines getting starved of fuel, but feels like you change gear really badly and it jerks forward,


t o t a l m i n i . c o m
Deano is offline  
post #13 of 30 (permalink) Old Feb 10th, 2009, 11:57 PM
MINI2 Master
 
SiBradbury's Avatar
 
Join Date: Jul 2004
Location: Wirral
Local Time: 08:46 AM
Posts: 1,425
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View SiBradbury's Classified Ads
 
You'd be far better spending your money on a diagnostic rather than replacing parts in the vain hope that they will cure the problem!
It's easy to be an armchair mechanic (god knows I meet loads of them everyday) when its not your own car you're attempting to diagnose! There's always some bloke down the pub who knows best!

ANYONE can post on here and tell you things that it MIGHT be! My mum could do that!

You could change, plugs, leads, fuel filter, air filter, etc etc and it might be none of them. Spend £40 on getting your beast plugged into a diagnostic (try and find a garage with a Bosch KTS system) and pin point the problem! (or at least eliminate some of those options!)
SiBradbury is offline  
The Following 3 Users Say Thank You to SiBradbury For This Useful Post:
post #14 of 30 (permalink) Old Feb 11th, 2009, 12:11 AM
MINI2 Privilege Member Has met Quack Quack Jack
PowerSteeringPumpActivist
 
NeuroBeaker's Avatar
 
Join Date: Feb 2007
Location: Behind the wheel
Local Time: 07:46 AM
Posts: 8,410
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Scotland Male View NeuroBeaker's Indi Blue & Body Color 1st Gen MINI One Profile
         
Quote:
Originally Posted by SiBradbury View Post
You could change, plugs, leads, fuel filter, air filter, etc etc and it might be none of them. Spend £40 on getting your beast plugged into a diagnostic (try and find a garage with a Bosch KTS system) and pin point the problem! (or at least eliminate some of those options!)
Good thinking.

NeuroBeaker - Proud owner of Zeus (a 'modestly modified' 2004 MINI ONE).
Helpful Links: [1st Gen. Power Steering Pump (PSP) Failure Guide] [1st Gen. PSP Repair] [Thread Titles] [Adverts Fix]
NeuroBeaker is offline  
Thanks for this post from:
post #15 of 30 (permalink) Old Feb 11th, 2009, 06:34 PM Thread Starter
Has met Quack Quack Jack
t o t a l m i n i . c o m
 
Deano's Avatar
 
Join Date: Jan 2008
Location: WWW.TOTALMINI.COM
Local Time: 07:46 AM
Posts: 2,758
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

United Kingdom Male View Deano's Pure Silver & Black 1st Gen MINI Cooper Profile
   
Send a message via MSN to Deano
Quote:
Originally Posted by SiBradbury View Post
You'd be far better spending your money on a diagnostic rather than replacing parts in the vain hope that they will cure the problem!
It's easy to be an armchair mechanic (god knows I meet loads of them everyday) when its not your own car you're attempting to diagnose! There's always some bloke down the pub who knows best!

ANYONE can post on here and tell you things that it MIGHT be! My mum could do that!

You could change, plugs, leads, fuel filter, air filter, etc etc and it might be none of them. Spend £40 on getting your beast plugged into a diagnostic (try and find a garage with a Bosch KTS system) and pin point the problem! (or at least eliminate some of those options!)
well i was told that, but the engine light hasnt came on, can the computer tell you what isnt running properly if the engine light isnt on? if I thought that would tell me id be down there like a shot! but my mechannic had told me, if the fault isnt happening when he has it, and theres no engine light, then how can he find it!!


t o t a l m i n i . c o m
Deano is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MINI Cooper Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




  LinkBacks (?)
LinkBack to this Thread: http://www.mini2.com/forum/first-generation-faults-fixes/167302-r50-loosing-power-chugging-when-accelerating.html
Posted By For Type Date
FAULTS AND FIXES on MINI2 - Fuel For Your MINI Obsession - MINI Cooper - S - One - Diesel - Works - Cabrio | BoardReader This thread Refback Feb 16th, 2009 07:00 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Rate This Thread
Rate This Thread:



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome