what is the tube that goes from the intake manifold body into the hole that is between #3 and #4 tube? what is the consequence without it?

thanks

you can see the picture here
http://cgi.ebay.com/ebaymotors...QrdZ1

 

that tube connects to the black box on the back of the engine block.

its for your PCV valve.

the PCV valve connects to the top of the tube (the "Hole" you speak of")

then a vacuum line runs from the pcv valve to the intake manifold

 

thanks for help. what is the consequence of not having pcv valve intact?

 

you will have a huge vacuum leak and idle at about 3k

 

thanks!!! it explains why i have crazy idle .....