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Old 01-08-2014
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99 Ranger - Gray vacuum line, pass side

I noticed a gray vacuum line was cut last week when I was changing plugs. I've also had some issues with my max AC cutting in and out, which I've read could be cause from a vacuum leak. I looked all over for pictures of engines bays, but haven't been able to find exactly where the other end of this line connects. It appears to be on the passenger side near some of the HVAC hoses. Does anyone have a good pic or can tell me exactly where this sucker goes?

Thanks in advance! I've also attached a pic of the line.
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Old 01-08-2014
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Goes to the vacuum actuator on the 4 port heater control valve.

When vacuum is applied the actuator shuts off the heater core. This is only in the OFF and MAX A/C positions.

When the MAX A/C position is selected the recirc door is closed, front vents are actuated and the heater core is shut off.

Since all of these are on the same vacuum "circuit" a loss in vacuum will cause them all to default. Front vents default to defrost vents, recirc door defaults to open allowing fresh air in, heater core isn't bypassed.

Check out this video I made for visual reference.

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Old 01-08-2014
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The other end may still be on the HCV. IF not you can pull the gray vacuum line and firewall "block" from an explorer or ranger at a junkyard for next to nothing. On this block there is also a black wire running form the vacuum ball to the firewall that comes attached.

Mine broke and I just replaced it for a bout 2 bucks using the junkyard part. I don't like having patches on my truck.
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Old 01-09-2014
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I don't have the vacuum ball or the piece on the heater control valve which the gray vacuum line connects to. I'm guessing it broke off. I'll run by the salvage yard once the weather breaks and see if I can find both these pieces.

Thanks a ton for the information and video, it was very helpful.
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Old 01-09-2014
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You sure you don't have the vacuum ball? If you don't have it then your max a/c would have never worked.

Its below the air filter box. In video its 0:36-0:39
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Old 01-09-2014
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So I just got a chance to pop the hood and take a peak. There is no vacuum ball, but I was able to find the heater control valve, and what do you know there is a bust end of a vacuum line on it! So, that part should be an easy fix.

What's throwing me is, my truck doesn't have the vacuum ball. Once it splits off from the red line, instead of going into a vacuum reservoir, it goes underneath the washer fluid reservoir. You can also see the other black line that comes off the firewall go into the same place under the washer fluid and it then connects to a white line. I removed this washer reservoir a couple of weeks ago to try and track these down, but you can't get to them even with it removed since it's under/inside the fender well. I think I would have to remove the plastic inner fenders to track them down. Maybe there is some vacuum canister in there that I just can't see.
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Old 01-09-2014
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Learn something new everyday. A 1999 must be different. Check this post out (has pics).

http://www.fordrangerforum.com/gener...defroster.html
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Old 01-10-2014
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Awesome! Thanks for tracking that down. I was scratching my head at what the previous owner could have done. Hopefully it'll be as easy as swapping in a new line and i'll be good to go.

Once again, thanks for all the help it's appreciated!
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