[patrickt]

I haven't washed an engine compartment in a long, long time... and I've never done it to my Cobra at all. But, any time I did it in the past I always had sensor or wiring/electrical problems after I did it. Plus, it would leave a stain on whatever was under the engine compartment (I would use the spray "Engine Brite" type grease cutter.) Now, when I "tidy up" the engine compartment in the Cobra, I use a rag and 409 spray cleaner and do it by hand. I love 409 -- it's my favorite cleaner for the car (I don't use it on the body though).