Vacuum routing crisis
11-15-12, 05:08 PM
#1
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Vacuum routing crisis
So I bought a 88 FC N/A recently and I've been working on it little by little but I've come across so many blocked off vacuum lines. My idles pretty high and read on the forums that this may be due to the vacuum lines. There are so many that I don't which ones' go where?! Please any info would be useful
11-17-12, 06:06 AM
#4
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I'm not really familiar with NA engines but i can tell you one thing for sure: The line in the second picture goes to the plastic thing in the fourth picture and the other line attached to that plastic thing goes to the back of the upper intake manifold to a vacuum source (one of the 3 nipples next to the throttle body. There should be a check valve inside of that hose from the intake to the plastic thing so it gets only vacuum and nothing else.
That's for cold starting purposes. It blocks the 2 lower throttle plates as long as the engine is cold so you can't destroy the engine by driving it too hard when it's cold.
That's for cold starting purposes. It blocks the 2 lower throttle plates as long as the engine is cold so you can't destroy the engine by driving it too hard when it's cold.
Last edited by Th0m4s; 11-17-12 at 06:09 AM.
12-08-12, 03:56 AM
#6
Junior Member
This link shows a couple of your vacuum ports and shows you how to restore your throttle body https://www.rx7club.com/2nd-generati...-takes-979364/
Also if you have a high idle and you have vacuum ports that are open you should try blocking the open ports to see if your idle speed comes down.
Also if you have a high idle and you have vacuum ports that are open you should try blocking the open ports to see if your idle speed comes down.
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