MY02 STi - I/C Waterspray
 

I know this has been debated before, but without the search facility I thought I'd ask again.

Does the STi 7 (MY02) PPP, have control of the I/C waterspray, or is it a manual thing only.

If it is manual only and not ECU controlled, how can it be made to spray at a certain boost pressure ? Is this easy/cheap to do ?

Many thanks.