quick vacuum line question
01-10-2017, 12:55 PM
#1
quick vacuum line question
(Not my truck)
My 84 was missing the round part right under the throttle linkage, right above the big line that runs to the booster. So took the carb and manifold from an 85 and it's running pretty good but I would like to know where that booger of a vacuum hose is routed to.
It's not in any of the diagrams from 1979-1986 but it obviously goes somewhere. Anybody know?
Vacuum manifold and carburetor are from an 85 4x4. I have all of the rest of them sorted out so I think this one just ties in somewhere. Not sure. Thanks.
My 84 was missing the round part right under the throttle linkage, right above the big line that runs to the booster. So took the carb and manifold from an 85 and it's running pretty good but I would like to know where that booger of a vacuum hose is routed to.
It's not in any of the diagrams from 1979-1986 but it obviously goes somewhere. Anybody know?
Vacuum manifold and carburetor are from an 85 4x4. I have all of the rest of them sorted out so I think this one just ties in somewhere. Not sure. Thanks.
Last edited by bootscootboogie; 01-10-2017 at 01:19 PM.
01-10-2017, 12:58 PM
#2
I did search, just in case anyone's wondering 
When you search for this kind of thing you get FLOODED with pictures that don't show where it ends, and diagrams from the book that I have in front of me that doesn't show it. Grrr.
Previous owner had it hooked to the vacuum switch, but other hoses run to that via the emissions system layout.
When you search for this kind of thing you get FLOODED with pictures that don't show where it ends, and diagrams from the book that I have in front of me that doesn't show it. Grrr.
Previous owner had it hooked to the vacuum switch, but other hoses run to that via the emissions system layout.
01-11-2017, 09:40 AM
#6
I kind of deduced it and have it ran to the small box beside the "vacuum switch" that has two ports on one side and a single port on the front. I ran it to the single port and it's running good but it baffles me that I can't find these things in a diagram?? I'm positive they're OEM parts. Maybe they're not considered part of the emissions setup. Only thing I can think of.
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01-11-2017, 11:45 AM
#8
I kind of deduced it and have it ran to the small box beside the "vacuum switch" that has two ports on one side and a single port on the front. I ran it to the single port and it's running good but it baffles me that I can't find these things in a diagram?? I'm positive they're OEM parts. Maybe they're not considered part of the emissions setup. Only thing I can think of.
Port A is farthest from the switch body, port B behind that and the other is the filter which you are missing.
In your photo the line running vertically is the vacuum supply, which runs to the A port of the AC vsv port B connects to the idle up actuator.
To make it function correctly you'll need to move to the B port instead of the vent.
