Ok, im having a lot of trouble getting my vacuum lines hooked up right. First off in the pic of the lim(not mine) theres vac nipple where both secondary injectors sit, theres one right below those on an angle, and one more at the bottom. I know the bottom vac nip gets run to the UIM to an air source(4 nipples on fire wall side of uim, bottom most being the only actual vac source, the rest are air). on the vac diagram it shows the vac nip thats on the angle is run to the primary fuel rail..weird thing is that my primary fuel rail has no vac nipples on it what so ever, it resembles a primary fuel rail in the emissions removal vacuum diagram thats floating around. i know that feeds to the FPR on the secondary fuel rail eventually..so i dont know how/where to hook up vac lines in this situation. right now i have a vac line running off the secondary fuel rail as in the stock vacuum diagram.. but that leaves the angled nipple on the lim open..do i just cap it? when i bought the car it had a blown engine and all emissions so i dont know why its like this...

my lim also has an allen key block like the one in the picture, and i dont know how to run the vac lines from the nipples off where the secondary injectors sit...

from researching ive found that my UIM has 4 nipples on the back..and i think the top most nipple is for the primary inj bleed, the one below that is for the secondary injector bleed ( the 2 nipples where secondary injectors are?...if so how do you run vac from both those nipples to this one nipple..a vac T?) i know the bigger nipple below that one is for the OMP spider, and the last one is for the vacuum off the throttle body with the check valve?

sorry i was rambling just trying to get everything in my head into this thread..so its probably very jumbled.. my car is an s5 T2 btw. somebody please help i have no clue whats goin on at this point and its really stressing me out since im so close to having this thing running!

 

is it true that i can just block off the secondary injector bleeders and the nipple on the UIM that they would run to? thats all ive figured out so far while waiting for a response..

 

Air bleeds can be blocked off, but they are useful in helping to atomize fuel. S4 cars don't even have them, so you can take 'em of leave 'em. The connection you have between the secondary bleeds would work if you keep it hooked up; just uncap the nipple on the right.

Can't comment on the others since I have a S4 with Jspec/Aspec manifolds & rails.

 

yea thats not my LIM..im glad to know it could work though. How are the lines run in a stock car..not like that?

 

well ive hooked up everything so hopefully it works ...

 

are you using the S4 or S5 fuel rail.... the S4 is aluminum and the S5 is metal

the S4 fuel rail you can remove the FPR... the S5 is welded to it

 

this is how i have everything hooked up now...

 

i always just assumed it was the S5 fuel rail ...now not so sure