Can you guys tell me where to route these connectors to, bottom side of plenum in the rear.


Tony

 

I"m not 100% on these, but they are all vacuum lines. The large one #1 is usually for large draw items like power brakes or a vacuum distribution thingy.

#2, I'm not sure. May be pollution stuff.

#3 I have connecting to my Fuel Pressure Regulator.

 

#2 Is to the MAP sensor

 

1 is the brake booster
3 is the Fuel pressure reg.
2 ...hehe...it goes into a "t" fitting. Big help, I know, sorry.

 

...mine is an 89, I'm guessing it's the same.

I'm sure one of the experts will chime in here soon!

 

Thanks for the pic. I am making my hand drawn schematic of all the vacuum lines so I understand them and that I have all the parts necessary when I get ready to install everything. Pics always help!
Tony

 

It really doesn't matter where they go, it's all vacuum. Things that require vacuum from the plenum (that I remember, I only have 3 lines remaining on mine) are:

Brake Booster
Fuel Pressure Regulator
MAP sensor
EGR solenoid
Heater control valve
Cruise Control

 

1. Brake booster cable.
2.EGR diverter valve
3. fuel pressure reg.

 

I thought it might be the EGR div. but didn't wanna guess.

Thanks.

 

I don't think so, the EGR solenoid gets its vacuum from the ported source at the bottom of the throttle body. Since this is a MAF plenum, #1 is the Brake Booster port, #2 goes to a two-way check valve (one output side feeds the HVAC, the other side feeds the cruise control), and #3 is for the fuel pressure regulator. If this was a SD plenum, it would have a #4 which would be for the MAP sensor.

 

88 has ALL the correct info.

 

Glad I didn't jump the gun!!! It's all Dr. Nick's fault!!! haha

I was only agreeing.