Vent Vaccum Lines

[TheDirtyJeep401]

I was told that there is a vaccum line that is used to open the dash vents, anyone have a pic of where it is suppose to be? Trying to fix the vents to where they don't only come out the defroster. It's an 86 2.5 thanks in advance.

[cruiser54]

The line runs from the firewall to a reservoir in the passenger side front bumper. 

[TheDirtyJeep401]

I think I found it, because there is no hose. Do they make replacements or do I have to make my own? Thanks for the help cruiser

[cruiser54]

Be more specific. No hose from the firewall to the "ball"? 

[TheDirtyJeep401]

There is no hose running along the firewall to the reservoir behind the bumper.

[cruiser54]

But the reservoir is there? 

[TheDirtyJeep401]

Yes

[cruiser54]

I don't know how to post photos up here but I have a diagram of that system. 

 

I just sent it to hornbrod.

[HOrnbrod]

[cruiser54]

Thanks Don!!!

[TheDirtyJeep401]

I have 2 hoses that are coming off of the reservoir, one going in right next to the blower, and one going through the firewall, I'll post pics tomorrow. Thanks for the diagram too, I'll be needing it.

[HOrnbrod]

Also make sure the vacuum check valve(s) are there and orientated in the proper direction to allow the intake manifold to "suck" vacuum. Depending on installed equipment that use vacuum to function (cruise, HVAC, cooling, etc.) there could be up to three check valves. They do go bad, and can be tested with a vacuum pump. Or do what I do, suck and blow using your built-in vacuum body pump. 

[GoyoIII]

I'm having a similar problem. When I'm accelerating outside air start blowing. This happens with or without the the a/c on. Any advice?

[ParadiseMJ]

On the firewall there are two small hoses coming OUT of the firewall.  One is pink(ish) the other is black.  The black one is the small one on the vac ball.  The pink one goes to the heater valve (if equipped).  The fat black hose on the vac ball is the SOURCE vacuum.  The small one is the HVAC/CAD line.   

 

A leak (crack/break/rub/disconnected line) will cause problem with the blend doors and possibly the cruise control.  Replace....as opposed to repair these bulk type lines...they're dirt cheap.