Nope, that's a shot vacuum diaphragm. Other symptoms will be failing to fast idle and sometimes a poor idle as well.

Steel yourself, because they aren't cheap. At least when I did mine, http://www.1stttoyotaparts.com/ (A dealer from Washington state) had the cheapest price, even beating out the aftermarket suppliers.

19220-35140à looks like about 120 from the dealer, aftermarket is about the same:

http://www.rockauto.com/catalog/x,carcode,1277535,parttype,7232

My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
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"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson