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: 10:11 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:	50
Size:	49.9 KB
ID:	175657  
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Jun 18th, 2014, 10:19 AM
MINI2 Senior
Offline
 
Join Date: Sep 2011
Posts: 454
Local Time: 11:11 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: 10:11 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
Offline
 
Join Date: Sep 2011
Posts: 454
Local Time: 11:11 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: 10:11 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:	27
Size:	39.8 KB
ID:	175673  
Reply With Quote
  #6 (permalink)  
Old Jun 18th, 2014, 02:43 PM
MINI2 Senior
Offline
 
Join Date: Sep 2011
Posts: 454
Local Time: 11:11 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: 10:11 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
Offline
 
Join Date: Sep 2011
Posts: 454
Local Time: 11:11 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: 10:11 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: 10:11 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
MOT Advisories - Would you buy this car?
Today 01:34 PM
Last post by Restyle
Today 08:40 PM
1 Replies, 131 Views
Erratic engine speed when cold
Oct 19th, 2014 09:56 AM
Last post by tyred bob
Today 08:37 PM
1 Replies, 259 Views
Clutch/engine problem
Today 07:33 PM
Last post by jamieeccles123
Today 07:33 PM
0 Replies, 33 Views
Key scratch to body work - Edinburgh
Today 06:31 PM
by Dudlg0
Last post by Dudlg0
Today 06:31 PM
0 Replies, 65 Views
MINI Remote Central Locking Won't Unlock
Today 05:33 PM
by KrisL
Last post by KrisL
Today 05:33 PM
0 Replies, 68 Views
help needed for choosing the tensioner
Today 05:13 PM
by tianfa1
Last post by tianfa1
Today 05:13 PM
0 Replies, 79 Views
R56 Footwell module dead
Jul 15th, 2014 04:19 AM
by miniuy
Last post by yourmate
Today 04:19 PM
7 Replies, 1,352 Views
Annoying vibration in the dashboard
Feb 14th, 2012 12:38 AM
Last post by ryanharris
Today 01:01 PM
8 Replies, 3,264 Views
LED Daytime running lights - retro fit
Apr 15th, 2014 06:08 PM
Last post by french01
Today 12:57 PM
7 Replies, 1,481 Views
What Sat nav cd do I need?
Today 11:47 AM
Last post by uk_ricky_uk
Today 11:55 AM
1 Replies, 102 Views
Paint warrenty
Today 10:16 AM
by Peter85
Last post by The Nun
Today 11:52 AM
1 Replies, 120 Views
Drivers door actuator, fitment?
Oct 6th, 2014 05:13 PM
Last post by uk_ricky_uk
Today 11:49 AM
2 Replies, 460 Views
Misfiring R55 JCW engine in 6th gear between 2k-3k RPM with throttle wide open
Oct 21st, 2014 10:30 AM
Last post by Mr Muffin
Today 11:00 AM
8 Replies, 851 Views
R56 Aux and Usb
Today 10:41 AM
by Redevo
Last post by Redevo
Today 10:41 AM
0 Replies, 112 Views
Sprintbooster for MINI Cooper R56
May 14th, 2009 04:29 PM
Last post by Gacek191
Today 07:41 AM
9 Replies, 3,509 Views
I need a tool to flash a JCW map to my 04 MCS ECU
Yesterday 09:42 PM
Last post by djtmalta
Yesterday 10:36 PM
2 Replies, 270 Views
Electric window stopped working
Jul 6th, 2006 03:48 PM
Last post by regarp
Yesterday 06:22 PM
34 Replies, 66,018 Views
Bonnet touching body
Aug 15th, 2014 03:47 PM
Last post by The Nun
Yesterday 03:58 PM
3 Replies, 485 Views
Facebook page selling mini parts around the uk
Yesterday 11:50 AM
by Alex93x
Last post by Restyle
Yesterday 03:25 PM
2 Replies, 189 Views
New Mini Cooper D - Worth the money?
Yesterday 01:33 PM
Last post by dangoodwin
Yesterday 01:33 PM
0 Replies, 175 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 09:11 PM.



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