Vacuum Lines

[LeKestral]

Hi guys!

Been working on the MU again... (like when did i stop haha)
She's been going great! Tackles most things with ease, now with her new IRONMAN 2" Suspension lift.
Love to do a bodylift too sometime... but hey.

Anyway. I'm going to be fitting a boost tap and gauge on my Turbo soon, so i was looking at all the components involved.
Boost T is all sorted, but it got me thinking about Vacuum Lines, as i'd never really paid attention to them before (apart from the brake booster line haha)

So i've got all these lines running everywhere and most of the rubber is pretty old. Needs new tubes, so i'm going to replace them as well.

My question is; would anybody be able to direct me as to which line is for which part. Which are vital?
They all seem to run to a center cluster of solenoids etc.
I'm going to replace them all with new lines, but i'd be interested to know which lines are for what? If anyone knows this cluster in a 1992 2.8 4jb1 MU
I'm sure some of them leak i'm sure because i hear a sucking sound for a few seconds after i turn off the engine.
I've heard of some people even removing most of them without an effect on the engine, but hey.
Sorry for the mud haha (Need to overhaul my engine bay)



Let me know!
Cheers

[geeves]

What mud?
Really need to trace them to be sure but but are unneeded. You need the boost line to the top of the pump. You need the line to the fast idle solinoid. You may need the line that goes to a canister on the frontsolinoid if you have sotf (no free wheel hubs)
The others can go
The sucking noise is probably the turbo winding down and normal

[isuzurob]

pull them all out and throw them all away along with the solnoids, need one from inlet pipe to top of injector pump and block vaccum hose off the alternator, will idle slightly slow when the air con kicks in but ive run 3 of my trucks like this for years, looks far tidier without it all

[jellis]

isuzurob wrote:pull them all out and throw them all away along with the solnoids, need one from inlet pipe to top of injector pump and block vaccum hose off the alternator, will idle slightly slow when the air con kicks in but ive run 3 of my trucks like this for years, looks far tidier without it all

Thats what i did except i kept the line off the alternator to the brake booster.
They brake pretty average, so having vacuum assist is good.