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Old May 17th, 2014, 06:36 PM
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Smile 2005 Cooper S idling issue

Hi I just recently bought a 2005 mini cooper S with 20k on the clock. All if fine other than an idling issue that seems to be happening all the time after I have been driving the car. Its hard to explain but when i stop at traffic lights it seems to hesitate as if it is being starved of fuel and sound like it wants to stall, it seems to be worse in hotter whether. I was wondering if anyone else has had this issue and if they know of a fix for it many thanks.
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Old May 18th, 2014, 11:26 AM
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Hi ya

It could be a few thing depending on if it's standard or modded are you running any mods

Let us know we my be able to guide you or put your mind at rest
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Old May 18th, 2014, 11:25 PM
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my stock 04 s does the exact same thing. no fix yet. it has 92k miles. it was doing it when i bought it. i have changed the plugs, wires, and the corroded coil so far with no results.
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Old May 19th, 2014, 10:42 AM
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[quote=dethbrd;3964282]my stock 04 s does the exact same thing. no fix yet. it has 92k miles. it was doing it when i bought it. i have changed the plugs, wires, and the corroded coil so far with no results.[/QUOTE

Hi ya

It's hard to tell over the bet but few things to check on a stock car no mods are

Check all your vacuum lines to you fuel pressure regulator and map sensors and your PVC pipes back to the SC
Clean out your intercooler and make shore the boots are fitted correctly.
Remove and lean your TMAP sensor to
Has the fuel filter been replaced if not it's always worth it.
Fuels pressure regulators can cause problems to.
Get your fuel pressure checked to.

The minis in hot weather do suffer from heat soak in hot wether which causes rough idle. if my one gets hot if I am sitting in traffic it gets a bit lumpy I just blip the throttle and it's ok for a little while.

You could also try a reset in the ECM it may have learnt some bad habits.
To do this just disconnect the battery neg first then poss leave it for 20 30 min the reconnect pies first the neg.

It also might get worth putting some good fuel system cleaner in

Hope this helps
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Old May 20th, 2014, 09:44 PM
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My cooper is standard and this issue seems to happen a lot more in hot weather could it be related to the throttle position sensor.
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Old May 21st, 2014, 06:57 PM
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Quote: Originally Posted by fastmat1993 (original)
My cooper is standard and this issue seems to happen a lot more in hot weather could it be related to the throttle position sensor.


If you have checked all you vacuum pipes and cleaned your map sensors
And the car has been fully serviced.
I would clean you throttle body and put some bg44k throw your fuel system.

Bg44k | eBay

The minis do run a little rough when they have been sitting in traffic getting hot more with the S than cooper but they still suffer a little

After that really you should really be running a diagnostic on it to check the sensors just to make shore there not feeding the ECM crap.

If your planning to keep you mini for a while and are good with computers buy your self some bmw software. Just stick to the DIS side of things you will be fine.

BMW USB Diagnostics OBD Cable Interface lead Ediabas Inpa DIS SSS Progman GT1 | eBay
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Old May 23rd, 2014, 09:17 PM
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Thanks Marque i have been thinking about getting a bmw diagnostics kit for a while now is dis pretty straight forward to use, I have used obd2 software on previous cars in the past and I found it relatively easy to use. Also have you ever used the SSS program for changing setting on the car mine has autolocks on which i wish to turn of but was just wondering how easy that is to use as well.
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Old May 23rd, 2014, 10:50 PM
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Hi ya

I am not very good with sss progman I normally use ncs for dummies it's easier to use for things like that.
There lots of write ups over the bm forums to help out
I normally only use sss if I have a BCU or IKE to change.

Hope this helps :-)
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