sensor

does anyone know what the sensor is on the air box? i think the air temp sensor. well i installed this item http://cgi.ebay.com/ebaymotors/20HP-SPEEDCHIP-TOYOTA-TACOMA-93-96-97-98-99-00-01-03_W0QQitemZ8028558197QQcategoryZ33597QQrdZ1QQcmdZ ViewItem#ebayphotohosting and i was wonderin if anyone else has done this. please no flaming, im just trying to sqeez every single pony i can from my truck, also does this really work, cause to me it rlly made drifference to me but i really want to know if anyone tried a dyno test on it.