Here's the vacuum diagram for my truck.


I'm trying to put it back to stock, if that's reasonable, after putting a junkyard engine from an '86 in. The hoses had been changed around on the old engine, and some stuff is missing, such as the "HICV." I've searche the web and this site, and haven't found a reference to this. Anyone know what it is?

I'm also unclear about which parts are referred to in the upper left corner; A/CL DV: Air Cleaner, what?

Thanks for any help,

-Mark