On my older engines that are really DIRTY I'd just go to the high pressure car wash, leave the engine running and go to work. I'd soak it with the tire soap they have in the high pressure washer, then use regular soap, rinse and then I'd have to wash the rest of the car because of the splatter from washing the engine while it's running.
I'd always try to keep the nozzle away from the computer. I've never had a problem but I do it when I don't have to be anywhere right away and when I had help available if needed. As I said.....I've never had a problem and the engine comes out clean with almost no effort on my part. Then I can start detailing it if I want.
There have even been a couple of times when I'd forget to leave the engine running and it has always started right up. I"ve been nervous every time but never any problem. Others might scream in horror. :bigscream :lmfao
