i just found out if you want to power wash your moter to use cold water.moter can be warm to the touch. you dont want to create steam as steam is the biggest problem with sensers. steam gets into tight spots very easly compared to water and it creates problems.. i used plastic bags to cover alt. and the fuse box on fender well.. i power washed under the hood as soon as i was done started truck and drove it for a few miles to dry it off..had no troubles.. just thought id add my thoughts as most of you probly already new this..

Ron