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2012 Subaru Outback...
 
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2012 Subaru Outback 141,000 miles rough idle

  

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Hey Scotty. I've heard you say many times that higher octane fule does nothing to a car that dosen't need it. I accidentally filled my Outback with 93 instead of 87 and now it idles like it's brand new. It tends to bog down a lot, almost to the point of stalling. It actually has stalled a few times going into drive from reverse. Now it's idling so smooth I can hardly tell it's even running. What do you think the issue is? I change my oil religiously and use high quality filters. Thanks. 


1 Answer
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You may have an engine that has carbon built up carbon, or your MAF sensor is dirty and not functioning correctly.


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