I tried to find the answer to this question elsewhere on the site but was unable to. I'm sure this is a repost, sorry.
I just bought an 05 STI two weeks ago and understand that the IC water spray is used to cool down the intercooler so the intercooler is able to cool the air down more before it gets to the engine. My question is, when should I use the water spray? What symptoms should I look for? And how long should I hold the button down?
Thanks a lot