Hello all, I have a quick question about the vacuum lines before I go about replacing them. This truck I bought is a 94 F250 with the 351W. It's missing the Vacuum Reservoir, and they have bolts just shoved in the vacuum connectors, which probably should have just been connected together. because this way they probably aren't doing anything if i understand the way they function correctly. I'm still trying to figure out all of this ford vacuum stuff! and it appears to have had a different reservoir than I picked from the junkyard, which is the plastic equivalent of the coffee can, just 1 vac input and 1 vac output. I say this because it has 2 different connectors that went over there. it has 4 lines coming in, red black and white, the red one is a single hose that goes into this little rubber connector that splits it into 2 red lines. then the 2 red lines go to 2 different rubber connectors that should fit onto a vacuum reservoir. or 2 vacuum reservoirs because the only ones i have seen have only 2 ports. The 2 rubber connectors that would go to the reservoir have a red and white line in one and a red and black line in the other. now that I am explaining it I can tell I am doing a terrible job . basically what I am wondering is whether each of these (the black and white vacuum out lines) can be combined when I re-do the lines in rubber, so that I can just use the reservoir I have. cant even find a pic of the one its probably supposed to have, probably because i don't know what i am looking for. I'm thinking make it 1 manifold vacuum line in and then a tee connecting those 2 vacuum out together and then running separate lines to their respective locations. Will this work?
thanks in advance guys
p.s. sorry the pics are sideways, no clue why it did that.

 

Here is a photo:


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ok, that's what I pictured it would look like. Any idea of the technical name for it so I can try and find one? or will what I had planned work? just combining the 2 letting them both take vacuum from the same tank? I'm assuming that is like 2 different reservoirs for the vacuum right? they are just stacked on top of eachother

 

Yes it is two vacuum tanks with white leaving one tank and the black one leaving the other tank.
Red is always the vacuum source from the main vacuum source (upper intake manifolds).

You should have a vacuum diagram sticker under the hood showing all of this.

 

The truck has the wrong core support (taken from a truck with the 6 cyl.) and while i have found vacuum diagrams online for my truck, I cant figure out whether I can just use the reservoir I found, which is only like the bottom half of the one you have the pic of, just has spots for 2 hoses. do you know whether the one tank will supply enough vacuum to run what that big tank would do. I suppose anything is better than what I have currently, which is no reservoir lol.

 

As you know these two vacuum tanks are just for the emission solenoid valves. One of the lines is for the EGR solenoid and the other is for the AIR injection system.
The vacuum for the EGR is only used during light throttle operations and not used during wide open throttle or at idle.
The EGR tank is 90 CU IN and the AIR tank is 180 CU IN tank (reservoir).

Your vacuum diagram for a heavy 5.8L truck in 1994 for 49 states would be like the one below.


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