Need Help 2s Install, completely stumped

[Charged Performance]

I will give this a shot as without being present diagnosis is difficult as there may be a piece of information I am missing.

Generally it is going to be very difficult to continue to use your windshield sprayer as a WI priming pump and also for cleaning your windshield unless you are going to put a solenoid on your winshield spray hose.

I will start with questions -

Is the inlet line filled with water? Are there ANY bubbles at all in it?

Until the inlet line is filled and stays filled pump activity and performance will be irratic - it will not self prime.

How about from the pump to the high speed valve?

A better way to test the system's potential would be with your ignition on but not running use a jumper wire and ground the brown wire on the high speed valve for one minute with your jet(s) in a measuring container. This will let you know if your flow potential is to spec. From there you can evaluate whether or not the system is metering the HSV properly.

Hopefully this will give you a start for some new things to try and I will contemplate others.