2-3 days back while driving, dashboard displayed check engine light for 2 seconds and then it went off. When I got the vehicle inspection done by the BMW dealer they told me that Cylinder #3 misfired and I need to replace all the spark plugs and ignition coil. Do I have to replace all the spark plug? If so any good Mechanic shop in Chicago? and how much should be the price for that?
We can take care of this for much less than the dealership,
That I can guarantee! PM me with what part of the city you're located at.
I stay near UIC. quite close to downtown
Did you ever receive my PM?
Could be plug, could be coil. Try swapping #3 coil to another cylinder and if the miss returns, see if it moved with the coil. If so, replace coil. If not, replace plug.
I suggest you mention mileage when asking for help, too. (Most times this happens at 60-70K miles or more.) I'd replace all plugs if one is bad, since they don't cost that much to DIY, but I might do coils individually.
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