Forced Induction Custom FI Setup Questions

Vacuum Problem?

Thread Tools
 
Search this Thread
 
Old 06-30-2007, 09:26 PM
  #1  
0.0 BAR
Thread Starter
 
Curry's Avatar
 
Join Date: Jun 2007
Posts: 38
Default 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?
Curry is offline  
Old 06-30-2007, 11:25 PM
  #2  
1.0 BAR
 
RandysSOHC's Avatar
 
Join Date: May 2007
Posts: 442
Default Re: Vacuum Problem?

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

you may have a vacuum leak
RandysSOHC is offline  
Old 06-30-2007, 11:47 PM
  #3  
0.0 BAR
Thread Starter
 
Curry's Avatar
 
Join Date: Jun 2007
Posts: 38
Default 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.
Curry is offline  
Old 07-01-2007, 12:03 AM
  #4  
1.0 BAR
 
RandysSOHC's Avatar
 
Join Date: May 2007
Posts: 442
Default 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
RandysSOHC is offline  
Old 07-01-2007, 12:13 AM
  #5  
0.0 BAR
Thread Starter
 
Curry's Avatar
 
Join Date: Jun 2007
Posts: 38
Default 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.
Curry is offline  
Old 07-01-2007, 12:17 AM
  #6  
1.0 BAR
 
RandysSOHC's Avatar
 
Join Date: May 2007
Posts: 442
Default Re: Vacuum Problem?

yea,my gauge is the equis or whatever
it has the thin nylon hose
RandysSOHC is offline  
Old 07-01-2007, 12:19 AM
  #7  
3.0 BAR
 
whiterice's Avatar
 
Join Date: Jun 2003
Posts: 3,975
Default Re: Vacuum Problem?

Originally Posted by Curry
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?
so if it worked before why did you change it?
whiterice is offline  
Old 07-01-2007, 12:32 AM
  #8  
0.0 BAR
Thread Starter
 
Curry's Avatar
 
Join Date: Jun 2007
Posts: 38
Default 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...
Curry is offline  
Old 07-01-2007, 02:03 PM
  #9  
0.0 BAR
Thread Starter
 
Curry's Avatar
 
Join Date: Jun 2007
Posts: 38
Default 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.
Curry is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dcg9381
Forced Induction
2
07-18-2007 12:53 AM
Stephen
Turbo Parts For Sale
5
04-16-2007 11:39 PM
titansvolz
Hybrid/Tech
4
05-10-2005 12:11 PM
boosted_b16
Engine Management
1
01-16-2005 10:27 PM
96DXHatchBlack
Forced Induction
8
10-16-2004 09:51 AM



Quick Reply: Vacuum Problem?



All times are GMT -5. The time now is 07:10 PM.