i have a proble would like to know if some one can help me with,its simple but just cant find it any where.i need a really good diagram of a 1990 z28 iroc.vaccum sysyem iam haveing problems with mine and just want to redo the whole thing,if any one has a pic of one can u send it my way plz and thz a mill

 

There should be a sticker under your hood showing you the Vacuum routing....Unless someone took it off that is.....

 

well it had one but my son took it of. he told me what is this sticker for and he had pieces of it lol

 

Hope this helps.

 

iam sorry that one didnt help much cuse its for a 89 and i need a 90 i tryed it but missing some hoses thx

 

That is the pic I received when I put my engine together. I asked for something to help me route my lines. It didn't really have all my hoses either. But it is a good start. After I got most of them routed, the rest just kinda fell in place. Another good way to figure it out is look at engine bay pics of someone who has a similar car. There are plenty of them on this sight. Or you could find someone with a car near you that you could look at.
Good luck,
FBird

 

try here:
https://www.thirdgen.org/techbb2/sho...hreadid=254761