Vacuum diagram

[copteaser]

87 GN, 3.8 . I am in the process of re-installing the engine back in place...everything is going well, but I hit a stumblin block. The vacuum lines on the driver's side are are not matching up. I need to re-install the vacuum line to the fuel pressure regulator, egr valve etc. Does anyone have a diagram to in which I could follow and re-install them.
Thanks

 

[tazgn]

I "believe" there is a pretty good diagram on your emissions sticker on the heater box if you still have it. But if not, I don't know of anywhere else there is a good diagram for our cars. I know chilton's and haynes manuals are pretty much USELESS for a turbo car when it comes to the turbo car specifics... But still, there are only 5 vacuum lines I can think of to the motor. One for the FPR (off the metal line that goes under the throttle body) another metal line undr the throttle body goes the the evap canister, and the 3rd line goes to the EGR solenoid (i Think, since I don't have an EGR anymore). The other two lines from the vacuum block go to the PCV valve and to the heater control and boost sensor stuff.... My lines are a bit different from stock now (no heater/EGR) but that's what I remember.

Derrick

 

[gofstbuick]

There is a larger steel line that points towards your DS fender, that is the vacuum source for EVAP cannister purge. The other two lines should be the same size, and either one can go to the EGR solenoid and the other to the the FPR. The big port off of the vacuum block goes to the PCV valve. Notice the vacuum block draws from a common plenum, which is manifold vacuum. The egr solenoid, and cannister purge are solenoids controlled by the computer, so the use of a ported vacuum source (like on some older non computer controlled engines) is nolonger needed, only a solenoid (hooked to manifold vacuum)to control a vacuum signal. The same goes for the wastegate solenoid, but with a controlled orafice. Also, the MAP sensor, heater control valve and air blend doors (controlled by the climate control rheostat) require some type of manifold vacuum source. So you really can't go wrong with your vacuum line hookup.