1991 940 Turbo wagon - I have a worn/torn hose that nobody at the local Volvo dealership seems to be able to find in the parts list. It's about 2-1/2 inches in diameter, and about 7 inches long. It connects the metal intake tube from the front of the engine compartment to the throttle body area. It's kind of "S-shaped" with hose clamps on each end. It's ripped somewhat, and my mechanic tells me that it is the reason that my car is misfiring/running rich. I have a stock engine photo with the item in question circled in white. The link for the photo is given below. Can somebody tell me what it's called, and what the part number is? I've searched many places without luck. Thanks!

http://www.geocities.com/budzag/engine01.jpg