Vacuum Problem?
 

Ok well before I had the line a little bit after the TB, it would read 0 and go up to 18 - 20 @ WOT. I then moved it to one of the vacuum lines near the fuel rails and the guage reads 20 when the car starts, but If i go WOT it barely moves. It would go to around 18 sometimes 15 but thats it.... Did I tap the wrong line again?

Re: Vacuum Problem?
 

any line should work,
it should be 20 at idle & 0 @ WOT

you may have a vacuum leak

Re: Vacuum Problem?
 

I'm going to tap the brake booster line tomorrow to see if that works, if not then theres something very wrong. My friend said that I'm either tapping switched lines or something is wrong with the motor itself.

Re: Vacuum Problem?
 

no...
the brake booter line is bigger,
not a big super deal or nothing,
but its going to take more vacuum for the gauge to read out,
just a second longer, ~/~//~ if you know what I mean

just "T" it into the FPR line
use the smallest vacuum line you can to the gauge

Re: Vacuum Problem?
 

Oh yea... =P

Well the line that goes to the gauge is that thin nylon whatever it is. Its an autometer phantomII gauge.

I don't have an FPR.... well there is one built into my fuel pump but im upgrading to a 255 and aeromotive EFI compact FPR . I still need to get a vacuum line for the FPR, BOV and Wastegate... And if somethings wrong with tapping one line then i'm going to have a big problem getting everything else to work.

It's steady while I idle and its steady for the most part while I drive, i may or may not dip 1-2 inches if i give it enough gas.

Re: Vacuum Problem?
 

yea,my gauge is the equis or whatever
it has the thin nylon hose

Re: Vacuum Problem?
 

so if it worked before why did you change it?

Re: Vacuum Problem?
 

My understanding is that when the car is started you should get a reading of roughly 20PSI.

With the line before the TB i get 0 PSI and it works like it should, just backwards...

So i moved it to one of the vacuum lines on the fuel rail and that gave me the reading of 20 but it isnt moving the way it did with the first hook up...

Re: Vacuum Problem?
 

Ok after some trial and error i found it!

There was another line on the side of the throttle body that had much more suction, plugging it up and it was good to go.