I was taking my '98 Boxster (5spd) throttle body apart and cleaning the idle control valve today to try to 'cure' a sometimes erratic hunting idle and noticed the rubber sleeves holding the T plenum connector had a small port on
each side. the right was connected to a small tube, but the left had no such tube. What do you do with the small hole of the left rubber sleeve? Is this the right part for the left side or did previous owner used 2 rights ? Do I plug it ? Does it matter ?
Visible part # is PXO 416 410-1