nice..i'm looking at doing one of these myself...where did you mount the other tank? i've got a spare one from my other car that i rarely drive. i doubt it'd miss it. also...what did it need to be wired to...just directly to the battery, or did you wire it to somehting else? or any other useful info on this.

 

i'm still pretty much a n00b at subaru's seeing as how i've had mine for a little less than 2 months...but does the wagon have 2 female ends for the pump on it or something? does the sedan have the 2 pumps already? I know my other car has 2 pumps, but only one female end...one for the front wipers, and one for the rear.

 

IIRC, I thought you could just buy the rear washer pump for the wagon and you can remove the sedan resivoir bottle and install the pump on the bottle, I think you just need some plastic weld or sealant of some sort to keep it from leaking. From everyone's posts it seems like you're planning on buying the entire bottle just to get that wagon pump. From other DIY instructions I've read there's even a mark on the sedan bottle where you could cut out for that secondary pump. I'm sure you could buy it from Auto Zone or some parts store and save a few bucks over the dealer's price.

Sorry if I am misreading everyone's posts, that's just what I was getting from it.

I've got a few other links to other DIY instructions on how to do this as I'm planning on doing this in a few weeks. I've already got a wagon and want to retain the use of the windshield washer nozzles for front and rear windows so I'm going to get another resevoir and put it in front of the battery.

I'm still trying to find some good instructions on how to use a boost pressure switch to only kick on at a desired pressure. The pictures on mrtrex's site aren't helping enough to figure it out. They sell the pressure switches on eBay for around 30$ but I'm not sure if they're adjustable. (just as an FYI for those considering using a boost pressure switch) Also, where do you tap for pressure for the switch? Did you tap the BOV line like you would for a boost gauge? It would seem easiest since its right there where the resivoir bottle and hoses are, but if you did tap your BOV line and have a boost gauge tapped there also, is there chance of it messing with the pressure readings the boost gauge gets?

Also, it was cool to see a pic of the diagram for the back of the STi switch as I'd prefer to use that for the clean OEM look over a generic switch but I can't figure out where to run which wires. I can handle tapping wires and what-not but knowing where to run them and why is what confuses me.

Sorry for the long post and load of questions, I'm wanting to cover this from all angles before doing it. Right now I'm still just planning on getting a second bottle, a seperate pump and then just running a switch to the cabin and have it be an on/off switch. I'd like to be able to figure out how to use the pressure switch but unfortunately can't figure out how it would be wired in and hooked up for pressure readings.

 

Sorry.... I think I made sense of this but want to make sure...

so you turn on the IC spray switch from the cockpit, a wire runs from that switch to one contact on the pressure switch, once the switch senses that the set pressure has been reached it pushes a "pin" or something down which allows power to run from the other contact on the pressure switch which runs from there to the pump giving it power, turning it on and voila the IC is sprayed with water, and vice versa once the pressure drops below the set point, the "pin" lifts off inside the switch and discontinues power to the pump.

Also, about how far away in the BOV line did you tap the boost gauge and IC sprayer switch? A matter of a few inches or more?

Thanks for the response

 

Ok... thats where I was getting confused. I was under the impression that the pressure switch was tapped much like a boost gauge, meaning that a seperate vacuum hose runs to the PS and just terminates at the switch, not that it is just in line with the BOV return hose. So pressure passes through the PS and at the set level it opens a circuit that turns on the pump, I'm assuming.

Again, I'm assuming that there are 2 contacts on the switch for running power to the switch and then one to run power from the switch to the pump itself. When you say the PS works on its own did you just wire it up so that it always has constant power going to the PS and it is not activated by any switch, where did you tap for power?

And then you have the STi switch wired up to spray on-demand manually seperate of PS. Again, another point where I was getting confused as you have yours setup differently then I was planning - the automatic functionality seperate from the manual functionality whereas I was just going to have the automated sprayer wired to a switch that I control manually. I concede that your idea is better as it'll alllow you to spray the IC when idling in traffic when off boost.

I want to wire up the PS to spray at a certain PSI but I want to be able to turn off and on the power to the PS so that it only sprays at that set PSI when I want it to. Mainly b/c I don't trust myself for remembering to keep the resevoir filled with water and have the pump kicking on sucking up nothing but air and burning out the pump or something.

Please correct me if I'm wrong about how your set up works.