Vacuum Line Identification

[Hobbles4u]

Have a 96 Ford Explorer XLT and took a picture of a vacuum line I can't find out what it broke off from. I'm hoping it's what controls ac cause that stopped working recently and hope if I fix this it will work again.

 

[koda2000]

Heater control valve maybe? You have the Job 1 SOHC engine. My last remaining SOHC is a Job2, so things are a little different.

 

[donalds]

Heater control valve I just looked at mine

 

[shucker1]

Makes for a good vacuum leak and poor performance..

I was about to say it makes it's way to the vacuum volume bottle.

 

[donalds]

Mine broke in the same spot lol

 

[shucker1]

Ahhh!

Gotcha.

Emergency...

Out of beer.

Going to fetch a 12 pack.

 

[Hobbles4u]

Thanks for that guys. So where is the heater control valve located? I've been trying to search for pictures or diagrams but can't find any that matches my vehicle. I also been digging around under the hood and can't find any obvious places it came from still. The biggest problem I'm having really trying to fix anything is not knowing what anything's called beyond obvious parts like I replaced my starter, radiator and the sort. Is there like a picture of an engine bay with labels on all the parts somewhere. For example with the picture I uploaded of something I have no name for but it also seems like it's missing a vacuum line to the back of it. Neither the stray line or this thing is pulling a vacuum so I'm assuming there is broken/ disconnected lines in a couple places that go to these hiding somewhere. Would the heater control valve mess with my a/c not kicking on?

 

[koda2000]

In the first original pic you provided (in post #1), the 2 heater hoses are just to the right of the broken line. The control valve should be located on those hoses and would have a vacuum diagram that would hook up to that broken line.

If you don't have a heater control valve, perhaps someone removed it. At some point I understand that Ford did away with the control valve anyway. If this is the case, just cap the broken vac line off and don't worry about it.

 

[donalds]

Here it is follow the gray line as I said mine broke in the same place

 

[Spudhut]

what is the purpose of the vacuum controled vane in the center of the intake?

 

[koda2000]

what is the purpose of the vacuum controled vane in the center of the intake?

IIRC it changes the path air flows through the intake plenum.

 

[Spudhut]

IIRC it changes the path air flows through the intake plenum.

Does this function relative to acceleration/engine RPM? I know Chrysler uses the same 'technology' in their V6 engines. Crappier than Fords I would say, many failing solenoids from the factory that control these devices.

Curiously....if this leaks around the seal, would this cause 'hard' and stumbled staring in morning cold weather?

 

[shucker1]

Curiously....if this leaks around the seal, would this cause 'hard' and stumbled staring in morning cold weather?

Possibly, best root cause would be excessive lean condition while running due to un-metered air getting past the Mass Air Sensor.

If the leak were minor you would see higher than normal fuel trims.

If the leak were major it may throw a CEL.

 

[Spudhut]

@shucker1 - Thanks, ill check that out...No CEL's unfortunately, even when running BT OBDII w/ FordScan Lite.

Sometimes its the obvious "right in your face"...