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Anyone know where these vacuum lines go? 1991 3.0


misterW

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Take a look at the pic, these are the vaccum lines that come off the back of the intake manifold, right near the distributor. You can see there are 3 lines that don't have hoses. I swear I labeled these. But somehow over the course of a project taking much, much longer than it should have...they're not labeled now, and I cannot find where they are supposed to go. I took a vid of the engine compartment before I took the engine out, but the file somehow got corrupted haha.

It's a 2wd, and I don't have AC anymore, so I don't need to worry about lines that do anything for that . Is there anything essential these lines are supposed to be doing, and if so, where do they get routed?
 

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Dirtman

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The brake booster and pvc line should be large diameters, the only smaller lines would be for the cab vents, dpfe sensor/egr valve, fuel pressure regulator and evap purge.
 

mtnrgr

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Went and looked at my 94 3.0...mine has lines to the brake booster, egr valve, egr vacuum solenoid, fuel pressure regulator..other holes are capped off. Since your 91 has no egr system, there are no lines for that. In the picture your brake booster line and fuel pressure regulator line is hooked up..cap the others and your good. My old friend had a 91 3.0 and it had mostly caps on the vacuum tree.
 

mtnrgr

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6" Skyjacker, with 1.5" coil spacers, custom radius arms, custom traction bars
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31x10.50
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Lord God is my guardian
Here are a couple of pictures of mine.
 

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misterW

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Thanks for taking time to answer, this was very helpful!
 

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