4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Vacuum Resevior Lines

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Old 03-11-2018
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Vacuum Resevior Lines

Can somebody show me where the two vacuum lines go that come off of my 2010 Ranger 4.0L Vacuum Resevior Ball? I know one goes thru the firewall and into the heater/cooler assembly and it looks good. I am assuming the other one comes from a vacum source. Mine was brittle and broke and was hanging there and I can seem to find where it attaches.
 
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Old 03-11-2018
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It is usually "T"ed with another vacuum line.

You should have a vacuum diagram in the engine bay, look for VAC RES and see if you can tell if it runs directly to the intake or shares vacuum with another device.

Worst case is that you add your own "T" to existing vacuum line, but better to find where it went originally so you don't have a vacuum leak from an open port

You can use rubber vacuum lines in place of the hard plastic lines, the hard plastic lines are cheaper, which is why auto makers switched to them
 
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Old 03-11-2018
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Originally Posted by RonD
It is usually "T"ed with another vacuum line.

You should have a vacuum diagram in the engine bay, look for VAC RES and see if you can tell if it runs directly to the intake or shares vacuum with another device.

Worst case is that you add your own "T" to existing vacuum line, but better to find where it went originally so you don't have a vacuum leak from an open port

You can use rubber vacuum lines in place of the hard plastic lines, the hard plastic lines are cheaper, which is why auto makers switched to them
No Luck! I can't find a diagram on the engine bay or the hood. I originally had a "p4041 egr" error. I replaced the EGR valve and noticed vacum lines were brittle and broken. We replaced the one to the EGR valve and noticed the other one went over to the passenger side of the engine and was broken off and just hanging there. I replaced it and assumed it went to the back of the valve on the heater core line. I then noticed the line hanging from the black ball vacum resevior I've tried Google, Hanes Manual and looked in engine bay for a diagram.
 
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Old 03-11-2018
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There would be a Black line and a Grey line coming out the firewall
Black line goes to reservoir
Grey line goes to Heat control valve on heater hose(only used for Max AC)

Ford dealer might print you a copy if no one here has it, I will look but they are not year specific
 
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Old 03-11-2018
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Originally Posted by RonD
There would be a Black line and a Grey line coming out the firewall
Black line goes to reservoir
Grey line goes to Heat control valve on heater hose(only used for Max AC)

Ford dealer might print you a copy if no one here has it, I will look but they are not year specific
thanks for the info. I have the Black and Grey hooked up correctly. I have two coming out of top (intake). One for over to EGR. The other came out and Broke. I think it goes all the way to Res. Vac. There is a tube coming off the back off the Heat Control Valve. Does vacuu line t off and connect to that?
 
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Old 03-11-2018
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No, the heat control valve would only have vacuum when Max AC was selected in the cab

I would use the broken one off the intake.

After hook up go out for drive, select Panel Vent and put fan to high, vent selection should work now.
Accelerate, put load on engine, if air starts to come out of Defrost vents then your Check Valve is also MIA.

Vacuum reservoir is there so the Vacuum motors that run the dash vent doors always have vacuum to hold them in position selected.
When you accelerate vacuum in engine drops to 0
Defrost vent is 0 vacuum
So if vacuum reservoir isn't holding vacuum then vent will change to Defrost as vacuum in engine drops.

Check valve for reservoir keeps highest vacuum in reservoir
Vacuum is NOT used up, it can leak out, but isn't used up
 
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Old 03-12-2018
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Originally Posted by RonD
No, the heat control valve would only have vacuum when Max AC was selected in the cab

I would use the broken one off the intake.

After hook up go out for drive, select Panel Vent and put fan to high, vent selection should work now.
Accelerate, put load on engine, if air starts to come out of Defrost vents then your Check Valve is also MIA.

Vacuum reservoir is there so the Vacuum motors that run the dash vent doors always have vacuum to hold them in position selected.
When you accelerate vacuum in engine drops to 0
Defrost vent is 0 vacuum
So if vacuum reservoir isn't holding vacuum then vent will change to Defrost as vacuum in engine drops.

Check valve for reservoir keeps highest vacuum in reservoir
Vacuum is NOT used up, it can leak out, but isn't used up
Thanks a Million! All the vent settings work correctly and all vacum lines are hooked correctly. I had hoped getting the Vac Resevior hooked up would have fixed my No heat at all, but I guess I need to look at Blend Door Acuator.
 
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Old 03-12-2018
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Yes, Blend door is electric
 
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