There is a car wash just off campus I frequent. It is one of those quarter fed, high pressure spray and foaming brush places. I love it since I can get up under the truck with the spray.
However, on spray option is "Engine Cleaner". It comes with a disclaimer that reads similar to "Donot drive car until ten minutes after spray. Failure to comply make result in stalling"
Just to feed my curiosity, what could be in the spray, why would you have to wait 10 minutes to drive, and even if I put grocery bags over my electronics (sensors, fused, etc) should I avoid high pressure?