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Discussion Starter · #1 ·
68k miles, 05 S60 2.5T
Vibration/rough at idle only. Otherwise the car runs very strong. I have just put in brand new Volvo spark plugs. During the rough idle, it almost sounds like the bassy noise that a diesel garbage truck makes when it stops next to you. Can it be the coils? I believe 2 out of the 5 coils have been replaced by the previous owner from the looks of it when comparing all 5. I have also cleaned the MAF.
 

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68k miles, 05 S60 2.5T
Vibration/rough at idle only. Otherwise the car runs very strong.
maybe your upper engine mount is worn out. If it is cracked on the side it is time to replace it.
 

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To check the coils, you can actually disconnect them one by one to see which one makes no difference on the idle.
 

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Discussion Starter · #4 ·
Thanks, I will look into each suggestion. Any specific brand of motor mounts to avoid? Or are they all the same?
 
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