vacumn lines
Thread Starter
Instructor
Joined: Sep 2004
Posts: 122
Likes: 0
From: Salt Lake City UT
vacumn lines
the three nipples on the back right side of a TPI, need help labeling them and finding out where they plug into. i know that the fuel press. regulator plugs into one of them just not sure which of the three it plugs into. any advice would help
Pro
Joined: Sep 2000
Posts: 599
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From: Tampa,FL
I don't know if this will help you or not...but this pic is off of my 96LT4...completely different but maybe not in this area?? working on uploading it into my gallery...it's pending right now. give it a few 
Last edited by ~db~; Apr 12, 2005 at 12:36 PM.
Racer
Joined: Aug 2004
Posts: 377
Likes: 1
From: Redmond Wa
The three vacuum ports on my ’91 support the FPR, the MAP sensor and a long “mystery” vacuum tube that disappears into a harness that goes to the drivers side (although I have never taken the time to trace it out completely, I think the long “mystery” tube supplies the vacuum reservoir that is located in the left front corner of the engine compartment). It really doesn’t matter in what order you plug the various tubes into the various ports on the plenum. Each port draws vacuum from the same location inside the plenum so pressures will be identical across all ports. Also, all ports are the same size so volumetric flow should not be a concern.
I think mine plug in from left to right; MAP Sensor, FPR and then the mystery tube. When I re-gasketed my top-end, I plugged the tubes back in to their most comfortable positions. The car runs great.
Hope this helps.
Chris
I think mine plug in from left to right; MAP Sensor, FPR and then the mystery tube. When I re-gasketed my top-end, I plugged the tubes back in to their most comfortable positions. The car runs great.
Hope this helps.
Chris
