Looking for vacuum line diagram

txateu · Post by **txateu** » Mon Feb 01, 2010 2:16 pm

Does anyone have this? I haven't seen it in the n12 manual that I have.

My main problem is finding where the vacuum line closest to the throttle body goes and the small vacuum line the comes off the brake booster connects (plenum end).

Any help would be appreciated

unique_ET_N12 · Post by **unique_ET_N12** » Mon Feb 01, 2010 3:57 pm

I got mine T-pieced to and from the blow off valve to the throttle bottle start and to the back of the throttle body..
best to show piks though, theirs so many its hard to write for me' anyways....

unique_ET_N12 · Post by **unique_ET_N12** » Mon Feb 01, 2010 3:57 pm

as for the brake booster one, ummm ohh I'd have ta check be back soon

txateu · Post by **txateu** » Mon Feb 01, 2010 7:05 pm

Cheers mate I'll post some picks tomoro

Yeah that break booster vacuum line is a head ache.

txateu · Post by **txateu** » Tue Feb 02, 2010 12:47 pm

At the moment I have the the vacuum lines set up as;

BOV - not connected

FPR to plenum nut (near the brake booster connection) then it comes out and Tee'd to Boost Gauge and throttle body

Brake booster nipple - plugged

Charcoal canister - to large nipple on the right hand side of plenum

Here are the photos I took today

From hear you can see that the FPR line goes behind the plenum

You can kinda make out the brake booster nipple and the the nut that the FPR line goes to and then Tee's off from

Any help would be appreciated and especially help with sizing a vacuum line that fits snug over the brake booster nipple as its smaller then the others

Andjeti · Post by **Andjeti** » Tue Feb 02, 2010 3:48 pm

On mine that tiny one near the brake booster goes to the stock boost gauge controller (Vacuum to Electric convertor). It wasn't connected when I got the car, and I can't remember wether I got the answer from the forums or the manual. I just used normal vac hose to connect it, doesn't appear to leak.

EDIT: Just looking through the manual, It's the "Boost Sensor" And it's meant to have a delay valve in the line

My BOV is T-pieced into the Plenum -> Boost Controller ->Wastegate Line, before the Boost Controller. Don't know if this is right, it's just how it was.

And it doesn't appear that my charcoal canister is connected. I'll have to fix that.

unique_ET_N12 · Post by **unique_ET_N12** » Tue Feb 02, 2010 7:50 pm

So shiny in the first piks!!!!
write ya soon, just gonna go out and study up on mine again and jog my memory with the pro's and con's of the lines... looks wrong though from what I can see

Is it starting and if so, how's it sounding and responding to opening the throttle

Damo · Post by **Damo** » Tue Feb 02, 2010 9:55 pm

The nipple on the T/B should run ONLY to the small nipple on the charcoal canister. Do not have the fuel reg teed into this line, it will cause high fuel pressure on idle!

Damo

txateu · Post by **txateu** » Wed Feb 03, 2010 4:30 pm

Hmm, I didnt' notice the second the nipple on the canister I'll plumb that in...

Can anyone confirm where the nipple on the from the brake booster hooks up to?

Andjeti I don't have that sensor in my engine bay

unique_ET_N12 · Post by **unique_ET_N12** » Thu Feb 04, 2010 2:09 am

what sensor???? the stock dash boost sensor???? what u have set up instead

Andjeti · Post by **Andjeti** » Thu Feb 04, 2010 2:46 pm

I can't find an actual vacuum diagram anywhere.

But I'm guessing if you don't have the stock boost sensor you don't need to connect that small line near the brake booster one. Just leave it blocked off.

unique_ET_N12 · Post by **unique_ET_N12** » Thu Feb 04, 2010 3:10 pm

don't block any of those lines as u can always have it leading somewhere to aid in something..
Did you mean the line behind the brake booster line thats going into the intake??
Have it going from their too the top small rail, behind the fuel rail. (there should be two rails behind that fuel rail)
The other end of that small top rail should go to the emissions canister, 'the bottom nipple on it where theirs one above it and a thick nipple to the side..
hope that helps for now

unique_ET_N12 · Post by **unique_ET_N12** » Thu Feb 04, 2010 3:27 pm

The very top nipple of the emissions canister should go too the bottom of that 90 degree bent short piece of rail then a small piece a boost line coming from the top of it looping down & across too the bottom small rail behind the fuel rail. Then the other end of that rail back over to the right side of the engine goes too (small piece a boost line again) the closest side of that T pieced bolt near the brake booster line. the other side of that T pieced bolt goes too the top of the fuel pressure regulator under the intake manifold.. Given u have the stock standard one still operating.....

txateu · Post by **txateu** » Sat Feb 06, 2010 12:17 am

unique_ET_N12 wrote:what sensor???? the stock dash boost sensor???? what u have set up instead

Hey unique nah I done have the stock boost sensor it must be missing? and I can find a spare. I have an aftermarket speco hooked up instead.

unique_ET_N12 · Post by **unique_ET_N12** » Sat Feb 06, 2010 2:10 pm

you still having trouble with it??? whats the progress????