Well as i said gee the Toyota diagrams are a very good representation of the actual part.
So here we go the idle control valve.
The OEM Beams one takes the air supply from the inlet pipe to the TB . Something i dont like. With the FI especially the SC as there is pressure when the TB is closed and the varying air the ECU is recalculating where the valve should be opened.
We will put the ICV on the bench to see what the actual resolution of voltage input the valve will open. But tuning with the Motec the existing one i can say that it isnt much.
So to change the set up i purchased an Caldina 2007 one for the reason that its air supply is from the air box, constant atmospheric pressure
And as i thought it is the same body :) So where there would be an opening in the body to supply air from the air inlet pipe it is not machined open. The air is supplied from the airbox.
The valve with no power is slightly opened for start up then the ECU will control the movement based on the Mapping.
In short with the air supply from the air box the ICV wont have a chance to block up with any crap, oil etc as its filtered fresh air from the airbox and the air pressure is constant.
Now the ICV has water in and out. All i need to do is block on of them so the return is thru the thermostat in the TB as normal. The thermostat for those who dont know closes once the TB has reached temp and stops coolant circulation.
Even tho im not in snowy , low temp climate i still want that OEM function.
Also it doesnt matter as the the first chamber isnt milled thru ill still use the Beams gasket.

Slight opening with no power

Chamber not milled open so no air can come from the air inlet to the BT