Ok, I'm reading the manual, and it looks like the default mode for the spray is off, and flipping the switch front puts it in auto mode, and holding it backwards is manual spray.
Correct? Why isn't auto the default mode?
Am I correct that both front and rear wiper spray pulls from the same tank in the trunk, while the spray is the tank under the hood? But, I should fill both with the same stuff?

 

once auto is on it spray once ever 5 sec or so

manual mode it spray as u hold it

 

The switch is a two position toggle switch. The front position toggles the ECU control of the spray on and off. (it doesn't spray unless the ECU commands, and that seems quite rare, unless pushing the car - HARD).

The rear position toggles the manual mode of spray on, but when the switch rocks forward, the spray stops (you have to hold it to keep spraying).

The mid position is neutral.

Shawn

 

actually i believe the correct spray pattern in auto is 2 sec sprays ever 5 seconds...

Reason for not defaulting in auto is it's illegal to have a car leek fluids on public roads, go to the track and ask them if they will let you use it. Wanna bet the odds on them saying yes... lol

 

I would bet the real reason it is not on by default is to try to prevent burning out the pump motor if the tank is empty. Think about what would happen if you ran out of fluid and you could not turn it off. (Not that you can tell when it is empty from inside the car, but you get my point..)

It is nice to be able to turn it on auto and then turn it off when you don't feel it necessary. I also like the fact that when you place it in auto mode you can spray manually and it returns back to auto mode after you release the button.

Chris

 

another possible reason is becasue the sprayer is almost worthless on stop and go driving or high speed driving. I believe it's intent was for rallies/ enduros. Those conditions would run the turbo non stop and over long periods of time, not to mention continuos air flow isn't happing past the intercooler and intercoolers only work if they have air passing over them (atleast air-to-air coolers). Another situation where the sparyer may help out is when the motor is cooling down from a heavy run and everything is hot, then it could be used to help cool the intake air down but there really is no performance gain from that, unless you are taking the car out soon after the first run.