Engine Degreaser, What to cover up? Options

[JoKeRkId613]

My engine area is VERY dirty. There's a lot of dust and grease all over the place and I found a spray can of degreaser in the storage room of my house. The instructions say to spray everything and then turn the car on and leave it on for 10 minutes. It then says to turn it off and spray the whole thing with water to get the stuff off. How effective is the degreasing thing? Will I see a huge difference? My main concern is spraying the whole thing... I don't think I should spray the whole engine compartment. Some parts must be covered up before I spray the thing... What parts must I cover up that shouldn't get sprayed with degreaser and/or water???

ANY ADDITIONAL INFORMATION WOULD BE APPRECIATED :-)

[cmorty]

Yep, those OBDII are awsome little machines. I used to deliver parts for AutoZone, and used to use them all the time.

The only thing is they only work on vehicles from 1985 and up. For the ones made from 1984 and below, you have to use other things. An OBDI might work, but you have to find all the little attatchments that go with it.

But the cool thing I like the most about the OBDII, is the ability to erase codes!

I know that this is illegal, but I did it a couple of times to help some friends pass inspection.