I have a 99.5 B5 and am installing boost gauge... For some reason on the manifold there is the flex hose that already has a T - Fitting on it that goes to 2 dif places. Should i add another t - fitting for my boost gauge now?

The fist pic is of the front point on the manifold that doesnt have any pressure lines on it.
The 2nd pic shows how the back point has 2 hoses... Now should i add another T to that line that already has a T on it?

 

Wow that is strange. I dont know what to tell you. There should be a vac line hooked up to the intake manifold. There should not be a T fitting already in the fpr vac line. Try to follow the vac line coming out of the T fitting from the fpr line and see where it goes. Not sure how not having a vac line on the intake manifold that you took a picture of would affect your performance, if at all.. But those pics make absolutely no sense to me, thats for sure. If you know the previous owner or can get ahold of them, i would and find out wtf they were doing/thinking.

 

hahah yeah i know what your saying. Basically those closed up one of the holes from the mainfold and put 2 hoses on the back one. I want to no tho if i can T off an already T-offed hose. I think i can cant see why it would make a dif so? but yeah any ideas where i should put my boost T fitting? which hose to t off of?

 

Definatly weird. I would check to make sure you dont have a vacuum/boost leak at the nipple in the first picture. On your car im pretty sure that line should go over to the turbo area. If it doesnt go there it should go under the intake to a solenoid valve. Im guessing there was some sort of blockage in that nipple so they just tied it into the fuel pressure regulator line. In any case it shouldnt be a problem to double t the line.