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 Mechanical Issue I NEED HELP

 Created by: ShawnPatrick
Orig. Posting Date User Name Edit Date
Jul 16, 2018 02:20PM malsal  
Jul 16, 2018 07:03AM kenatminimania  
Jul 13, 2018 11:16AM onetim Edited: Jul 13, 2018 11:54AM 
Jul 13, 2018 09:55AM ShawnPatrick  
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 Posted: Jul 16, 2018 02:20PM
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Cherry hot exhaust can also be caused by a blocked catalytic converter.

If in doubt, flat out. Colin Mc Rae MBE 1968-2007.

Give a car more power and it goes faster on the straights,
make a car lighter and it's faster everywhere. Colin Chapman.

 Posted: Jul 16, 2018 07:03AM
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Quote:
Originally Posted by ShawnPatrick
2002 Mini Cooper S 120000 miles, I started a major loss of power about 4 weeks ago at 5000 RPM it would just hit a wall would not pull any further. I started doing some research and everything kind of pointed towards the air bypass valve on the supercharger. I had all of The symptoms,  felt felt like it was yo-yoing, could not could not get on the freeway safelw, and it was straight drinking fuel. This past Saturday night on the freeway and get just would NOT go, my feet were gonna catch fire from a resignating heat, get home yank the hood and the exhaust was cherry. pull it apart last night to change the bypass valve and the throttle body inside of it the butterfly when it should be closed you can hold it up and there's definitely an open space you can shut it with your fingers but it does not stay shut any suggestions or help would be greatly appreciated
An 'unclosed' bypass valve would definitely cause a loss of power.  This will cause the boost to bleed into the intake instead of going into the engine.  As a first step, you should replace the bypass valve to see if the symptoms persist.  A new bypass valve should make a big difference.

Ken

 Posted: Jul 13, 2018 11:16AM
 Edited:  Jul 13, 2018 11:54AM
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I do not know this car but. look for vacuum leaks, cracked or loose ducting. No codes? You can't tell by looking at the throttle body if it's right or not, if electronic it only works when the car is running, if mechanical they are normally open a little at closed position. A scan tool would show if the air bypass valve is in normal range, and if the Throttle position sensor is in normal range as well, for WOT and idle. Also be careful pushing hard on the broken car, as you may, or may have already melted the cat bricks, which will make even the fixed version of your Mini really slow.

 Posted: Jul 13, 2018 09:55AM
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2002 Mini Cooper S 120000 miles, I started a major loss of power about 4 weeks ago at 5000 RPM it would just hit a wall would not pull any further. I started doing some research and everything kind of pointed towards the air bypass valve on the supercharger. I had all of The symptoms,  felt felt like it was yo-yoing, could not could not get on the freeway safelw, and it was straight drinking fuel. This past Saturday night on the freeway and get just would NOT go, my feet were gonna catch fire from a resignating heat, get home yank the hood and the exhaust was cherry. pull it apart last night to change the bypass valve and the throttle body inside of it the butterfly when it should be closed you can hold it up and there's definitely an open space you can shut it with your fingers but it does not stay shut any suggestions or help would be greatly appreciated