2008 R56 non turbo - rough idle with AC on

 Created by: Roadwarrior
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 Posted: Jun 6, 2019 04:49AM
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Move the coil to another cylinder, and see if the miss fire follows.

 Posted: Jun 6, 2019 04:29AM
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Quote:
Originally Posted by Roadwarrior
my 2008 R56 non-turbo car just recently started to run rough when the A/C is on.  Also got a #4 misfire code.  Any suggestions on where to start to solve this?
Perhaps the easiest first step is to check for corrosion on the connectors to the coil packs. Then check the condition of the spark plugs and re-gap them.  I presume the car gets regular maintenance.

 Posted: Jun 6, 2019 03:11AM
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my 2008 R56 non-turbo car just recently started to run rough when the A/C is on.  Also got a #4 misfire code.  Any suggestions on where to start to solve this?