Seafoam makes a product with a long "straw" that slips under one of the intake hose joints and allows you to spray the cleaner into the engine upstream of the throttle body while it's running. That way you don't have to manually go in there and spray and scrub. If they are easy to remove I...

Really good information on speaker replacement, sizing and wiring.

http://www.volvo-forums.com/t21128-ster ... -wagon.htm