If you are having issues with a rough idle on your Volvo and you don't have a record of the throttle body ever being cleaned then this is something you'll want to consider doing. If there is an inexpensive project like this that I can do that removes grime from where it shouldn't be and will If you are having issues with a rough idle on your Volvo and you don't have a record of the throttle body ever being cleaned then this is something you'll want to consider doing. If there is an inexpensive project like this that I can do that removes grime from where it shouldn't be and will