Quote Originally Posted by RhdDc2
I dont believe that the piece underneath your throttle body is an IAC valve. It flows coolant through the throttle body for cold starts and to prevent your throttle body from icing in cold climates
it is an iacv on the y7 tb...it's a 3 wire iacv.

you need to use the one that your ecu is for. if you upgraded to a y8 ecu or chipped p28 and will tune it, then you'll need to do the 2 wire conversion and wire to the iacv on the back of the manifold. if i remember correctly you'll need to also use the y8 tb (or one that doesn't have the iacv on it) b/c it'll cause an idle issue b/c the iacv on the tb will no longer be active (can't remember exactly, but i no longer use my y7 tb and i wouldn't have removed it if there wasn't a reason to).