stampedecarwash
Member
Hello, it seems like soap comes out on the HP Wax pass exactly when the boom is coming up while washing the back of the cars. Not sure if that's some soap left from previous passes which is Triple Wax/Shine (Although I changed that pass from HP Wax to HP Rinse and I don't see the soap anymore). I thought perhaps there is soap somehow mixed with the chemical I use but then why it does it only when the boom comes up while doing the back of the car. Could there be a solenoid or a plunger opening up somewhere while not supposed to?