Strong cleaner thats safe for the engine, etc?

Going to clean up my greasey engine bay tommorow, crap all over the vavlve covers on down. Whats strong that won't screw up anything?

TAKE YOU TPS OFF. they don't like water. i know they have been fixed for later models but better safe than sorry. other than that get some greased lightning. spray on scrub rinse and repeat. kind of like shampoo.

Castrol SuperClean!! Just don't get the TPS wet with anything including clean water. SuperClean can be bought at Walmart for around $6 a gallon. Squirt bottle and cover the engine. I then rinse it with hot water. It is alkaline so it cleans the battery well. Don't leave it in contact with aluminum for a long time or it will turn it slightly white.