'94 850 Turbo. I had the fuel rail off the other day and can't remember if the fuel press regulator has a vacuum line coming off it and if it does, where does it go to? The vacuum tree? Sorry, wasn't paying close attention at the time. Thanks guys.

 

Yes the fuel pressure regulator does have a Vacuum line attached to it. It supplies less fuel pressure under high vacuum and more fuel pressure under low manifold vacuum.

The small nipple on the left is the vacuum connection.

 

question if the vaccuum side is leaking gas. is it time to replace the unit?

 

You had to ask that?

 

Yes. It should not be leaking fuel from the vacuum port.

 

YES.

It's junk as the vacuum side will be sucking raw fuel into the intake causing it to run very rich on the cylinders closest to the spot where the vacuum line is connected.

 

Play nice !!

 

Lol I had to clarify here on the forum. I ordered a bosch unit today. I'll take some pics & post for future reference on the fuel regulator install.