My Cooper S is under-powered - why? - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Engine & Drivetrain Tuning > First Generation MINI Tuning


First Generation MINI Tuning
Find Sponsor products associated with this forum
Tuning the first generation MINI 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
Cooper vs. Cooper S problems YaP Second Generation Faults & Fixes 8 May 21st, 2014 01:43 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Cooper. Cooper s or cooper sd coupe morgs18 General Discussion 3 Feb 7th, 2014 10:31 AM
Learning to Drive MINIs the Way John Cooper Intended AutoGuide.com MINI News 0 Jul 26th, 2013 06:12 PM
A Look Back at the Three Generations of the Mini Cooper & Cooper S mab01uk MINI in the Media 2 Mar 10th, 2013 10:11 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Feb 26th, 2014, 08:48 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
My Cooper S is under-powered - why?

Hi,

I just bought my first Mini and chose a nice 2003 manual Cooper S.
When i test drove it i did notice it felt sluggish, but was in a bit of a hurry and just went ahead and bought it (private sale).

Having just driven properly for the first time, something is not right!

I timed a 0-60 and it took 11 sec. Aircon was off, flat dry road, and no strong winds. Now that is bad! The Cooper S is supposed to be 7.7 sec.

Apart from that, the car drives fine:
* Cruises at 95mph (although took longer than expected to get there!)
* No strange noises
* No unusual temperature
* No unexpected fluctuations in revs

I read that sometimes the Catalytic Converters can go wrong and restrict exhaust flow. Maybe this is the problem?

Any help and suggestions much appreciated.

Julian
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Feb 26th, 2014, 09:03 PM
MINI2 Master
Offline
 
Join Date: Feb 2011
Location: South london
Posts: 1,190
Local Time: 11:51 PM
United Kingdom Male
Hi ya

It Could be the cat but I think you would have other problems.
Get your bypass valve checked out this will cause low power normally the thing that fails.
Check your intercooler boots make shore there not leaking or split.

Has the car had any mods done to it ?

When was it last serviced
Reply With Quote
  #3 (permalink)  
Old Feb 26th, 2014, 09:27 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
Quote: Originally Posted by marque (original)
Hi ya

It Could be the cat but I think you would have other problems.
Get your bypass valve checked out this will cause low power normally the thing that fails.
Check your intercooler boots make shore there not leaking or split.

Has the car had any mods done to it ?

When was it last serviced

thanks for quick reply - much appreciated.

I'll get the items checked that you mention.
I dont think there are any mods, certainly the guy i bought from didnt mention. It was services recently, but not a BMW place, a local garage. I'll get it checked out by a decent mechanic.
Reply With Quote
  #4 (permalink)  
Old Feb 26th, 2014, 10:05 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
Quote: Originally Posted by marque (original)
Hi ya

It Could be the cat but I think you would have other problems.
Get your bypass valve checked out this will cause low power normally the thing that fails.
Check your intercooler boots make shore there not leaking or split.

Has the car had any mods done to it ?

When was it last serviced

Could it be a supercharger issue? I do remember feeling slight vibration on the pedals/floor on idle now and again (intermittent) when sitting in traffic.
Reply With Quote
  #5 (permalink)  
Old Feb 27th, 2014, 06:26 AM
heathwebbo's Avatar
MINI2 Regular
Online
 
Join Date: Feb 2014
Location: Burton on Trent
Posts: 217
Local Time: 10:51 PM
United Kingdom Male
Superchargers normally go noisy when they have problems. As mentioned get the bypass valve checked because if it isn't closing you won't get any boost when you put your foot down
Reply With Quote
  #6 (permalink)  
Old Feb 27th, 2014, 07:47 AM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
Just a thought: when I rev up in neutral (standing still) the revs are slow to pick up, and even slower to drop back to idle.
Reply With Quote
  #7 (permalink)  
Old Feb 27th, 2014, 07:58 AM
MINI2 Premium Member
MINI2 Master
Offline
 
Join Date: Mar 2012
Posts: 3,076
Local Time: 10:51 PM
United Kingdom Male
Quote: Originally Posted by jjg23 (original)
Hi,

I just bought my first Mini
When i test drove it it felt sluggish,
but was in a bit of a hurry and just went ahead and bought it (private sale).

Having just driven properly for the first time, something is not right!

Julian

Dont buy one in a hurry without driving it properly is the answer that springs to mind.
Reply With Quote
  #8 (permalink)  
Old Feb 27th, 2014, 09:42 AM
MINI2 Master
Offline
 
Join Date: Feb 2011
Location: South london
Posts: 1,190
Local Time: 11:51 PM
United Kingdom Male
Hi ya

Like I said check you ic boots and bypass valve, if you pull off the bypass valve make shore it's closing fully, it's a known place to pick up free power.

http://www.mini2.com/forum/first-gen...libration.html

The rattling at idle is most probably your clutch but to check this just push the clutch pedal down see if it goes.

Also a thing to check is you supercharger belt is ok, you can check this quickly by looking at the tensor locking holes you should be able to see the top of the top hole. If you can't see the hole you should replace the belt
if it's slipping you will have low boost = lower power see picture below.

Maintenance :: Girl's Guide to Changing Serpentine Belt - North American Motoring

i don't know if you are interested but i have also attached a picture to make to belt tensioner tool



Hope this helps
Attached Thumbnails
Click image for larger version

Name:	photo.JPG
Views:	73
Size:	33.2 KB
ID:	169834   Click image for larger version

Name:	photo 1.jpg
Views:	73
Size:	32.5 KB
ID:	169842  
Reply With Quote
  #9 (permalink)  
Old Feb 27th, 2014, 11:29 AM
MINI2 Regular
Offline
 
Join Date: Feb 2014
Location: Derbyshire
Posts: 76
Local Time: 11:51 PM
United Kingdom
Get your air and fuel filter changed first if you don't know the history of them. Also the spark plugs. Basically a proper service. Get the easy, cheaper stuff ticked off the list before you start delving deeper.

Also I wouldn't read too much into your 0-60 time. To get anywhere near 7.7 sec time you are going to have to really hammer it, like dropping the clutch at high revs and giving it zero mechanical sympathy.
Reply With Quote
  #10 (permalink)  
Old Feb 27th, 2014, 05:35 PM
MINI2 Regular
Offline
 
Join Date: Feb 2012
Location: London
Posts: 323
Local Time: 11:51 PM
United Kingdom Male
Sounds like my car when I first got it! Bypass valve !! My car wasn't modded when I first got it and the bypass valve wasn't closing or evening opening fully when I checked it! It ain't hard to get out either, plenty of walk throughs
But
You can check it befor removing it. If you know where it is you can get your hand down there and push the spring type thing and see if it goes in and springs right back out.
About a hour work all in all I'd say,
Reply With Quote
  #11 (permalink)  
Old Feb 27th, 2014, 09:38 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
ahhh, gotta say big thanks for the great replies, (perhaps except The Nun - nice to kick a guy when he's down!).

I will follow the advice and try and get some progress at the weekend on this.

Cheers guys, appreciated...been a bad week!
Reply With Quote
  #12 (permalink)  
Old Feb 27th, 2014, 10:37 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 6
Local Time: 10:51 PM
United Kingdom
BTW, given that the engine is supposed to be around 160bhp, what kind of effect do you think a bad set of IC boots and/or bypass valve could have on power? I honestly think i'm down by around 30-40% of power. Is it possible to have some much loss from these items?
Reply With Quote
  #13 (permalink)  
Old Mar 4th, 2014, 07:50 PM
MINI2 Regular
Offline
 
Join Date: Feb 2012
Location: London
Posts: 323
Local Time: 11:51 PM
United Kingdom Male
Not sure about the boots but bypass valve I had about 30 to 40%
The differance when changed was amazing.
My car didn't really go past 90 mph
But it was really bad damaged.
How is the car in acceleration ?
Get the intercooloer off and then the throttle body and bypas valve. It's very easy to do if your okay with a DIY
Reply With Quote
  #14 (permalink)  
Old Jun 15th, 2014, 09:11 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2013
Posts: 3
Local Time: 11:51 PM
I too purchased a 2003 MCS a few days ago for my girlfriend and thought it was seriously under powered. Had nothing to compare it to though so decided to do a 0-60 run to compare to factory quoted. By 10 seconds was only in 2nd gear and only at about 50mph. Suddenly the car went into limp mode and threw up a few error codes. Checked out the bypass valve the following day, if you remove it and shake it you shouldn't hear any rattling and the valve should also spring return to closed position. To cut a long story short the seller paid for a new valve from bmw (about £55) I fitted it and my god did it make a difference. I would definatley start with the bypass is a pretty easy job to check out and has made a huge difference.
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
Cooper vs. Cooper S problems YaP Second Generation Faults & Fixes 8 May 21st, 2014 01:43 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Cooper. Cooper s or cooper sd coupe morgs18 General Discussion 3 Feb 7th, 2014 10:31 AM
Learning to Drive MINIs the Way John Cooper Intended AutoGuide.com MINI News 0 Jul 26th, 2013 06:12 PM
A Look Back at the Three Generations of the Mini Cooper & Cooper S mab01uk MINI in the Media 2 Mar 10th, 2013 10:11 AM

» Recent Threads
IMPORTANT. Have you had a power steering pump failure? Please vote YES or NO!!!
Jan 22nd, 2004 11:45 AM
by waynef
Last post by jowev
Today 10:28 PM
1,112 Replies, 337,463 Views
2015 Countryman
Today 09:15 PM
Last post by Canadianboy95
Today 09:15 PM
0 Replies, 21 Views
What type of person drives a MCS
Oct 27th, 2006 02:14 PM
by popey
Last post by drmdtsap
Today 08:38 PM
81 Replies, 4,112 Views
Issue with mini 2005 convertible roof
Yesterday 03:16 PM
by boppu
Last post by Mid Life Mini
Today 07:49 PM
4 Replies, 314 Views
bolt on bhp
Today 04:08 PM
Last post by The Nun
Today 06:03 PM
2 Replies, 115 Views
Fitting a Bugaboo in a Mini Cooper 2011
Today 02:37 PM
Last post by nidawaseem
Today 02:37 PM
0 Replies, 95 Views
New comer with some questions..
Yesterday 01:31 AM
by mcoop
Last post by davidscott
Today 11:47 AM
3 Replies, 348 Views
H7r vs factory xenon
Today 10:59 AM
by Nickgo
Last post by Nickgo
Today 10:59 AM
0 Replies, 97 Views
Central locking problem Locks then unlocks straight away
Yesterday 02:45 PM
by Skitos
Last post by heathwebbo
Today 07:12 AM
2 Replies, 226 Views
No power under 4000 rpm and hard start
Yesterday 10:39 PM
Last post by burnstar
Today 06:59 AM
1 Replies, 221 Views
Winter Tire Recommendation
Yesterday 12:21 AM
by Jason04
Last post by cristo
Yesterday 07:58 PM
1 Replies, 357 Views
loss of radio reception
Oct 28th, 2014 07:00 PM
by k3fus
Last post by k3fus
Yesterday 07:43 PM
2 Replies, 346 Views
How do you actually know if you have heated wing mirrors?
Oct 14th, 2014 12:32 PM
Last post by mj2k
Yesterday 07:39 PM
6 Replies, 732 Views
Programming guide
Yesterday 06:42 PM
Last post by Wheelnut3104
Yesterday 06:42 PM
0 Replies, 217 Views
Best private / personalized plate?
Aug 14th, 2002 08:22 AM
Last post by french01
Yesterday 05:34 PM
1,259 Replies, 91,624 Views
Things I've bought ,added or stolen
Yesterday 04:03 PM
by sirron
Last post by The Nun
Yesterday 04:17 PM
1 Replies, 234 Views
Engine Coolant Circulating?
Oct 28th, 2014 06:48 PM
by sp8600
Last post by sp8600
Yesterday 11:57 AM
2 Replies, 363 Views
Times, they are a changing, or not.
Yesterday 10:21 AM
Last post by The Nun
Yesterday 11:06 AM
1 Replies, 232 Views
Times, they are a changing, or not.
Yesterday 11:02 AM
Last post by kippax_ffl
Yesterday 11:02 AM
0 Replies, 187 Views
HELP > Sticky windows
Yesterday 10:50 AM
by jj10
Last post by jj10
Yesterday 10:50 AM
0 Replies, 189 Views
» Premium
» Auto Insurance
Ľ Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 10:51 PM.



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