when car is in idle seems to run rough and takes more time to speed up!

If you haven't changed the spark plugs for 25,000 miles or so, replace them with new Volvo plugs. Other than that you'll need to have the codes pulled from the engine control module and perform the troubleshooting for the codes retrieved.

i do think the problem could be one of the coil packs as i had same trouble when i over tightend one and cracked it when i changed the plugs