Re: vacuum lines for boost solenoid
 

This is correct. There is a 90 coming off the solenoid and then a straight vac hose to the w/g actuator. On the solenoid, the nipple closest the firewall is open to atmosphere.

Re: vacuum lines for boost solenoid
 

http://www.installationinstructions....egate_hose.pdf

Looking at replacing some vacuum lines. In reference to the ones shown in the diagram in the link above (the same ones the OP described), I found the one that goes to the turbo itself unattached. The hose itself was old and didn't stay on very well so it probably just slipped off. My question is what specifically is the purpose of this vacuum hose and what can happen if detached?

Re: vacuum lines for boost solenoid
 

The one that has pressure from the compressor?

It opens the wastegate. Without it, your boost will be high. Very high. As in gasket-poppin' high. Basically, without any control at all. Of course you'll lose a bit of pressure via the open fitting or loose hose. But there is not enough volume there to really keep things in control.

A straight piece of 7/32" hose to replace it will work fine.

Re: vacuum lines for boost solenoid
 

I believe so. There's one hose to the solenoid that goes down to the V which has one hose branching off to the wastegate and then the other hose that branches off and goes directly to the turbo. This is the one that goes directly to the turbo.

Re: vacuum lines for boost solenoid
 

New to the site... and, as of last Friday, new owner of a 1987 Regal Turbo. I have been reading quite a bit on here am learning as I go. I take it this is the boost solenoid? I have an open port and am not sure if that is atmospheric reference, or if something is missing...


http://i667.photobucket.com/albums/v...psc6e59ad2.jpg

Re: vacuum lines for boost solenoid
 

Yes, and yes. That port had a rectangular foam filter on it from the factory, but they did not stay on long after the cars left the factory. I had a box of new ones I bought years ago, and they even turned to junk away from heat and light. Leaving it open is OK.

Re: vacuum lines for boost solenoid
 

You can buy those filters for $2 for 3 at many of the TR vendors (Kirban, GBody, Highway Stars, etc.). Just put a little butyl tape on the back of the nipple and it will stay on.

Re: vacuum lines for boost solenoid
 

...until it fragments into nothing. Unless you are in a show and being concours judged, I would not waste your time or money.

Re: vacuum lines for boost solenoid
 

I had some other stuff to order and a three pack of filters was cheap, so I went ahead and bought some. Thanks for the assistance, I have a lot to learn about on this car.

Re: vacuum lines for boost solenoid
 

No problem just ask if you need any more info on stuff or where to buy it. Keller's T/R is a different animal. It breathes fire and burns up his solenoid filters so he's really angry about it.