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My name is ***** ***** I am a Volvo dealership technician. I am going to try to help with your question today. What cylinders are misfiring? What fault codes are stored? Did you verify the coils were not firing or was that just a guess?
How are you checking the coils?
A code reader cannot tell you if the coils are working. Just because there are misfire codes does not mean the coils are not firing. How are they being checked off the car?
I am going to have to opt out. I don't think I will be able to help you with this. The question is opened to all other experts. If one feels they can help, they will respond here.
What codes were you getting? Have you ruled out vacuum leaks or other possible causes?