Finally have time to work on the car again '87 TII
I had finished with the fuel system problems(shout outs to Satch for helping me)
now i need to move on to the vacuum system someone else messed with it

First issue:
where do these connect to i have an idea but just need to be sure its right

 

D fuel pressure regulator 4

A1
B2
C3

the curled hose in back should go to the twin scroll solenoid on the turbo

 

ok thought so thanks

next up
this line was connected to some others where the pressure regulator goes
i traced it as far as i could and it goes somewhere behind the cluster

it was just connected somewhere near the pressure gauge



same line from the underneath near the foot rest

 

no factory hoses run through there, likely it was used for an aftermarket boost gauge.

 

The car does have a boost/vac gauge in the the top by the door and a control box
Should I just leave them on the same line with the normal
Pressure gauge ?

 

If someone can tell me where this goes thatd be great its on top of the UIM
it used to be capped off but i dont know were it goes or if i should just leave it capped

 

it runs to the backside of the stock S4 top mount intercooler.

 

ok so if the intercooler goes there
then someone connected it to this
what connects to this?
all i can see is a spring

 

Not trying to be a dick but here's a quick Google for diagrams. I have a feeling you need to route more... lol

https://www.google.com/search?site=&....3.T5MbPEC0YmI

 

Double post...

 

also to the intercooler, in nearly the same place

i actually looked to save myself a little headache, but all i saw was S5 diagrams which are slightly different, not counting the 30,000 FD variants

 

I'm pretty sure there is a specific thread, if not sticky, about s4 vacuum routing. Could be wrong. Not about to go searching for it either lol

 

i always try and search as much as i can before i post
but this seems like a small part that i could not
find anything on it

well i can just hook both parts using a vacuum tee to the only part thats on the intercooler

 

then you have an S5 intercooler on an S4 engine, the S4 intercooler had 2 ports on it. the rear port isn't of much importance anyways.

 

ahh ok will that all makes sense now
thanks for the help