1998 S70 Intake Hose and Vacuum Locations

Post by **kickin_it** » 11 Nov 2013, 19:58

I am in the midst of performing cn90 PCV mod to the s70 and a couple of other mods. I ran into a problem. I removed my plastic intake hose to clean the PTC and did not label the 5 hose connections like an idiot. I have the vacuum hose diagram but I can only find four and it does not state exactly where on the intake hose they go. Help!
A = New I.D. 5/8'' hose to Oil Trap (thanks cn90)
B = New vacuum hose to side of intake manifold (thanks matthew1)
C = ??? Fuel Pressure Regulator?

: Bottom of Intake Hose

D = ???
E = ???

: Top of Intake Hose

Post by **kickin_it** » 12 Nov 2013, 07:46

I am also having some technical issues with 1 of the 3 hoses coming off of the intake manifold.
The line in question is Red "F".
F = ???
G = Vac Line to Blk/Wht Inline Valve
H = Fuel Evap Line w/ new vac line elbow

: Intake Manifold Hoses

Here is another picture of hoses pictured above. I am 95% sure the Blue "C" is the hose that hits at the bottom of the plastic intake hose NEXT to the PTC nipple, not on it. Purple "I" is a line to the clip that mounts on the air box. I think it routes to one of the nipple on the top of the plastic intake hose pictured above at possible D or E location.

C = Next to PTC to Inline Wht/Wht Inline Valve ?
G = Vac Line to Blk/Wht Inline Valve
F = ???
I = ???

: Hoses

Post by **kickin_it** » 12 Nov 2013, 07:59

Here is another view of Purple "I" and the clip that connects to side of air box. I am thinking this is a vacuum line to a nipple on the TOP of the plastic intake hose, I think labeled D or E from above.
I = ?

: Clip

Post by **bskeels** » 12 Nov 2013, 08:17

your blue C line goes to connection C
your puple I line and red F line goes to the connections D, E
Connection B should go to the elbow on the passenger side of the manifold
That should cover it

Post by **kickin_it** » 12 Nov 2013, 08:24

D = F
E = I
C = C
I think that does about cover it! Maybe I can edit my previous posts as *Resolved* for a possible sticky for vacuum hose diagram that is a little bit easier than the diagram posted under the hood.

Post by **cn90** » 12 Nov 2013, 08:34

Seems "about" right.

However, if you run into more problems, let me know, I can take a whole bunch of photos of my setup for the sake of future reference.

Post by **kickin_it** » 13 Nov 2013, 09:30

D to F seems counterproductive to me. D is obviously going to have suction from it being routed off of the plastic intake hose but to me it seems as if F would also have suction from it being routed off of the intake manifold. Can anyone else confirm that hose F, from intake manifold, routes to nipple D on top of plastic intake hose?

Post by **kickin_it** » 13 Nov 2013, 20:51

Anyone snap a pic of their hose locations for the intake manifold hoses?

Post by **kickin_it** » 14 Nov 2013, 14:36

I think this diagram finally reveals where the hose form the manifold ends up and it is on the turbo and not the plastic intake hose.

Sufbug · Post by **Sufbug** » 30 Oct 2020, 19:09

Saved my life here.....thank you! Go slow and mark all your vac lines, and put all nuts and bolts in separate ziplock bags.
I always tell my self that.
I never do that.