Rough idle on my 2013 Mini

 Created by: jduffy
Orig. Posting Date User Name Edit Date
Sep 5, 2019 05:30AM kenatminimania  
Sep 3, 2019 08:46AM jduffy  
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 Posted: Sep 5, 2019 05:30AM
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Quote:
Originally Posted by jduffy
I recently purchased a new to me, 2013 Cooper S Roadster. Overall, the cars runs great except it idles a bit rough. I've learned this car requires premium fuel and i'm wondering if the idle may have anything to do with the car not having premium fuel in it? For all i know the previous owner (s) may have never used premium fuel.

In my limited research i've read Yea and Nay with regards to adding fuel additives. Need some advice. TY
Nay on the fuel additives, although a bottle of techron probably wouldn't hurt. Your 2013 R58 Cooper S should idle fine with regular or premium gas, unless you have a bad tank of gas....

How many miles on the car?  I presume there are no check engine lights?

I would check the conditions of the spark plugs - maybe they will tell you something.

Failing that, there may be a fuel issue at idle (fuel pressure / injector clog)?  Carbon buildup at the valves or on the pistons? Small vacuum leak?  defective turbo bypass valve?  Could be anything....

 Posted: Sep 3, 2019 08:46AM
Total posts: 1
Last post: Sep 3, 2019
Member since:Sep 3, 2019
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I recently purchased a new to me, 2013 Cooper S Roadster. Overall, the cars runs great except it idles a bit rough. I've learned this car requires premium fuel and i'm wondering if the idle may have anything to do with the car not having premium fuel in it? For all i know the previous owner (s) may have never used premium fuel.

In my limited research i've read Yea and Nay with regards to adding fuel additives. Need some advice. TY