vacuum diagram

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vacuum diagram

September 23, 2006, 08:32:19 AM

I'm trying to restore the EGR vacuum hose on a 1987 t-bird 3.8L that I bought a couple of months ago. Previous owner just took the hoses off. I'm having a difficult time figuring out the diagram. I cannot find what is the 'V REST' and the 'PURGE CV' It looks like a hose should be going from the PVC valve, to the 'V REST' to the PURGE CV. Help anyone?

vacuum diagram

Reply #1 – September 23, 2006, 08:07:13 PM

V REST- Vacuum Restrictor
PURGE CV- Purge control valve

The vacuum line that opens the EGR valve also opens the Purge CV.

So at the same time you are recycling exhaust gas you are also purging the carbon canister.

The vacuum hose to the PCV valve also goes through a V REST to the the PURGE CV to suck the fumes out of the carbon canister.
The PCV Valve should have two hoses on it.

great

Reply #2 – September 23, 2006, 11:48:40 PM

thank you. Where can i buy a vacuum restrictor do you think?

vacuum diagram

Reply #3 – September 24, 2006, 05:50:25 PM

Don't know where you can buy a restrictor. Are you sure it is gone.
There is a color code for the restrictor hole size. In my '84 T-Bird it is blue.
The shop manual says this is a .015" hole.

I would try a dealer. It can't be very expensive.

thanx

Reply #4 – September 25, 2006, 09:07:13 PM

thank you for the photos. that is exactly what I needed.