No Boost - Help! - 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
Read here if speccing visual boost radio (Saves you money!) ryanm8655 Third Generation MINI Cooper S 2 Jun 7th, 2014 12:31 PM
R56 no boost das882 Second Generation MINI Cooper S 1 Dec 3rd, 2013 08:01 PM
R56 Cooper S fault codes/ no boost das882 Welcome New Members 3 Mar 27th, 2013 09:45 AM
Visual boost to mini connected cdgill241184 General Discussion 0 Mar 1st, 2013 08:37 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Jun 17th, 2014, 05:13 PM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
No Boost - Help!

Hi,

Hoping one of you can help me or point me in the right direction

Ever since I have had my 08 Cooper S, there has been a lack of power. I thought nothing of it as I had nothing to compare it to. The car is driven mostly by the wife.
I recently had it in a garage to have a service done and was told that the turbo is not working at all

The garage connected it to a diagnostic machine, no error code. Played around with turbo to ensure the parts are working as they should, all fine. He then traced the vacuum pipe which connects to the turbo and it went all the way back to the pressure regulator valve. He thought maybe this wasnt working as should and bypassed the valve by disconnecting the in + out pipe and connecting together temporarily. Fired the car up, took it for a gentle spin and straight away the power was awesome, turbo doing its job but obvious overboost as there wasnt a valve in place to regulate the pressure/boost. I ordered a new valve (attached) from Mini and replaced the old one. Connected everything back up as normal, took the car for a drive and still no boost!

Is there something obvious that I am missing or any checks which i should do? The turbo is obviously working as we bypassed the valve and everything is fine. Any pointers would be great...
Attached Thumbnails
Click image for larger version

Name:	IMG_4143.jpg
Views:	42
Size:	49.9 KB
ID:	175657  
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Jun 18th, 2014, 10:19 AM
MINI2 Senior
Online
 
Join Date: Sep 2011
Posts: 433
Local Time: 08:28 PM
Luxembourg Male
Am thinking that your pressure converter is actually okay. Connecting the in/out together just bypasses the pressure converter and doesn't necessarily prove it's defective.

Not hugely familiar with the S setup, but on the diesel engine variants the pressure converter adjusts the VNT mechanism based on measured manifold pressure. So maybe your MAP sensor is bad. Either that or the electrical connection to the pressure converter is bad.

Am curious about this as I also have a lack of power on my Cooper D and no error codes showing...


Quote: Originally Posted by yaw631 (original)
Hi,

Hoping one of you can help me or point me in the right direction

Ever since I have had my 08 Cooper S, there has been a lack of power. I thought nothing of it as I had nothing to compare it to. The car is driven mostly by the wife.
I recently had it in a garage to have a service done and was told that the turbo is not working at all

The garage connected it to a diagnostic machine, no error code. Played around with turbo to ensure the parts are working as they should, all fine. He then traced the vacuum pipe which connects to the turbo and it went all the way back to the pressure regulator valve. He thought maybe this wasnt working as should and bypassed the valve by disconnecting the in + out pipe and connecting together temporarily. Fired the car up, took it for a gentle spin and straight away the power was awesome, turbo doing its job but obvious overboost as there wasnt a valve in place to regulate the pressure/boost. I ordered a new valve (attached) from Mini and replaced the old one. Connected everything back up as normal, took the car for a drive and still no boost!

Is there something obvious that I am missing or any checks which i should do? The turbo is obviously working as we bypassed the valve and everything is fine. Any pointers would be great...

Reply With Quote
  #3 (permalink)  
Old Jun 18th, 2014, 01:39 PM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
Thanks for taking time to respond. Some good pointers which I will be sure to take a look at. Failing those, I don't think I want to waste any more time or money on the issue. It has been suggested to me to bypass the valve again, and install a manual boost pressure along with a gauge. That way I can control the boost to a level that the S is comfortable with



Quote: Originally Posted by MiniDeLux (original)
Am thinking that your pressure converter is actually okay. Connecting the in/out together just bypasses the pressure converter and doesn't necessarily prove it's defective.

Not hugely familiar with the S setup, but on the diesel engine variants the pressure converter adjusts the VNT mechanism based on measured manifold pressure. So maybe your MAP sensor is bad. Either that or the electrical connection to the pressure converter is bad.

Am curious about this as I also have a lack of power on my Cooper D and no error codes showing...

Reply With Quote
  #4 (permalink)  
Old Jun 18th, 2014, 01:55 PM
MINI2 Senior
Online
 
Join Date: Sep 2011
Posts: 433
Local Time: 08:28 PM
Luxembourg Male
Manual boost pressure and gauge won't work. ECU will expect a mapping between manifold pressure and air to fuel and will throw codes if measured doesn't compare to reference. You'll get yourself into more difficulties taking that approach like under and over-boost conditions. Strongly advise against it.

Quote: Originally Posted by yaw631 (original)
Thanks for taking time to respond. Some good pointers which I will be sure to take a look at. Failing those, I don't think I want to waste any more time or money on the issue. It has been suggested to me to bypass the valve again, and install a manual boost pressure along with a gauge. That way I can control the boost to a level that the S is comfortable with

Reply With Quote
  #5 (permalink)  
Old Jun 18th, 2014, 01:59 PM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
By the way, is the MAP sensor the the part I have circled in the attached picture? This hasn't been changed yet, the only thing that was done during diagnostics was that it was unplugged, which resulted in the engine management light coming on. Does this prove proper operation?
Attached Thumbnails
Click image for larger version

Name:	map.jpg
Views:	21
Size:	39.8 KB
ID:	175673  
Reply With Quote
  #6 (permalink)  
Old Jun 18th, 2014, 02:43 PM
MINI2 Senior
Online
 
Join Date: Sep 2011
Posts: 433
Local Time: 08:28 PM
Luxembourg Male
That looks about right to me.

Actually, I am also having an issue with power loss on my Clubman D and have exactly the same question as you regarding sensors and error lights. I strongly suspect that if the sensor is disconnected and it throws a CEL, then it's working properly but I am not absolutely certain.
Reply With Quote
  #7 (permalink)  
Old Jun 18th, 2014, 02:55 PM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
I will order a new sensor and let you know how I get on, they aren't very expensive.

Not sure if you can entirely rely on the engine management light. Could it be that when plugged in, the car still detects the sensor as plugged in and assumes that it's working? (Even if in reality it's not doing the job). Or is it clever enough to know that although plugged in it's not working how it should?
I don't know the history of the car before I bought it, for all I know there could have been some type of error code related to this part and it was just cleared, therefore the car thinks nothing is wrong

Quote: Originally Posted by MiniDeLux (original)
That looks about right to me.

Actually, I am also having an issue with power loss on my Clubman D and have exactly the same question as you regarding sensors and error lights. I strongly suspect that if the sensor is disconnected and it throws a CEL, then it's working properly but I am not absolutely certain.

Reply With Quote
  #8 (permalink)  
Old Jun 18th, 2014, 06:47 PM
MINI2 Senior
Online
 
Join Date: Sep 2011
Posts: 433
Local Time: 08:28 PM
Luxembourg Male
Could be it only looks for the sensor, so maybe it provides a bad reading, but it still present. Would have to see which code gets thrown.
Reply With Quote
  #9 (permalink)  
Old Jun 23rd, 2014, 11:05 AM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
Map sensor changed, still the same issue. Taking it to a BMW/Mini specialist to have a look. Will keep you updated..



Quote: Originally Posted by MiniDeLux (original)
Could be it only looks for the sensor, so maybe it provides a bad reading, but it still present. Would have to see which code gets thrown.

Reply With Quote
  #10 (permalink)  
Old Jul 2nd, 2014, 08:31 AM
MINI2 Newbie
Offline
 
Join Date: Jun 2014
Posts: 8
Local Time: 07:28 PM
United Kingdom
Issue finally fixed car is now running and driving like a dream. There was some corroded wiring which was causing an issue between the electrics. The mechanic tried to explain to me exactly what was wrong, but I didn't understand too well due to the lack of knowledge I have with turbos and how the electronics of a car work


Quote: Originally Posted by yaw631 (original)
Map sensor changed, still the same issue. Taking it to a BMW/Mini specialist to have a look. Will keep you updated..

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
Read here if speccing visual boost radio (Saves you money!) ryanm8655 Third Generation MINI Cooper S 2 Jun 7th, 2014 12:31 PM
R56 no boost das882 Second Generation MINI Cooper S 1 Dec 3rd, 2013 08:01 PM
R56 Cooper S fault codes/ no boost das882 Welcome New Members 3 Mar 27th, 2013 09:45 AM
Visual boost to mini connected cdgill241184 General Discussion 0 Mar 1st, 2013 08:37 AM

» Recent Threads
Clubman rear window shattered in heat
Today 05:28 PM
Last post by ClubmanLee
Today 05:28 PM
0 Replies, 16 Views
Mini one diesel juddering engine help please
Today 04:36 PM
Last post by Markla78
Today 04:36 PM
0 Replies, 57 Views
posting in ads
Today 11:40 AM
Last post by Caveman
Today 04:17 PM
2 Replies, 89 Views
Visual boot radio
Yesterday 07:51 PM
by jamie w
Last post by The Nun
Today 03:10 PM
2 Replies, 202 Views
Corrosion of Window Regulators
Today 12:18 PM
Last post by The Nun
Today 02:23 PM
2 Replies, 104 Views
CARiD has launched a 10% Military discount
Today 02:04 PM
by carid
Last post by carid
Today 02:04 PM
0 Replies, 67 Views
294mm Disc upgrade on Cooper SD 63 plate
Today 01:55 PM
Last post by elliot174
Today 01:55 PM
0 Replies, 98 Views
autyomatic transmission fluid
Today 12:03 PM
Last post by cantfindthegenepool
Today 12:03 PM
0 Replies, 102 Views
Mini loses power and leaves me on the motorway
Yesterday 08:49 AM
Last post by misstic79
Today 11:59 AM
2 Replies, 284 Views
2nd hand JCW Sytner Coventry
Jul 16th, 2014 06:38 PM
by LA3195
Last post by Captain5691
Today 11:37 AM
7 Replies, 899 Views
De-crudding my paintwork
Jul 12th, 2014 01:35 PM
Last post by LA3195
Today 10:10 AM
10 Replies, 682 Views
Looking for Mini-experienced mechanic / garage
Today 03:07 AM
Last post by halesowenmum
Today 03:07 AM
0 Replies, 192 Views
Mini One 2004 COnvertible Window Problem
Nov 24th, 2013 06:08 PM
by bryanuk
Last post by duncanwood
Yesterday 09:38 PM
1 Replies, 673 Views
Convertible roof problem.
Mar 16th, 2006 03:51 PM
Last post by duncanwood
Yesterday 09:25 PM
12 Replies, 30,072 Views
mini connected HELP
Yesterday 06:39 PM
by jamie w
Last post by jamie w
Yesterday 06:39 PM
0 Replies, 194 Views
MINI Cooper 07 R Version
Yesterday 12:17 PM
Last post by SADAMS1980
Yesterday 01:38 PM
2 Replies, 246 Views
Liquid Yellow MINI Cooper poll and showcase! Show your LY MINI pictures here!
Jan 30th, 2005 05:53 AM
Last post by wiesel59
Yesterday 12:10 PM
117 Replies, 48,292 Views
HELP!!! Replacing rear seats.
Jul 26th, 2014 05:14 PM
Last post by Angib
Yesterday 10:05 AM
1 Replies, 299 Views
Jcw question!
Jul 26th, 2014 04:34 PM
by E2J
Last post by The Nun
Yesterday 09:34 AM
3 Replies, 301 Views
Power Steering Pump DIY
Oct 23rd, 2008 07:22 PM
Last post by Amithlon
Yesterday 09:05 AM
52 Replies, 63,414 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 06:28 PM.



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