Vacuum Question
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Joined: Feb 2002
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Vacuum Question
'94 Ranger 4.0L Auto
On the drivers side near the firewall is a vaccum ditribution module with about 5 lines attached to it(I don't know the proper name)..can anyone tell me:
1)Is it important which line is connected to which nipple
2)The proper connections?
Thanks!!
John
On the drivers side near the firewall is a vaccum ditribution module with about 5 lines attached to it(I don't know the proper name)..can anyone tell me:
1)Is it important which line is connected to which nipple
2)The proper connections?
Thanks!!
John
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Joined: Apr 2000
Posts: 1,746
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From: PNW
Vacuum Question
Last time I had those off, I seem to remember that most of the lines were different sizes, so your chances of putting them on wrong are reduced. But, since they are all using the same vacuum source, I can't see why it would matter. Except maybe if there's a molded hose then you might not get it hooked up if you try to go to the "wrong" port. Other than that, there's no right or wrong, there's nothing inside the fitting which will alter the vacuum signal.
The brake booster is probably the biggest, followed by the PCV valve. I think the A/C and the fuel pressure regulator are the same size. My truck is manual, but since you have an auto, then you'll also have a line for the vacuum modulator.
The brake booster is probably the biggest, followed by the PCV valve. I think the A/C and the fuel pressure regulator are the same size. My truck is manual, but since you have an auto, then you'll also have a line for the vacuum modulator.
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Vacuum Question
Thanks for the info..appreciate it!
The reason I ask is that one of them has fluid in it..might be tranny fluid..so I'm wondering if my vacuum modualtor is bad and I'm seeing the fluid up top..or if I just have something connected wrong..
John
The reason I ask is that one of them has fluid in it..might be tranny fluid..so I'm wondering if my vacuum modualtor is bad and I'm seeing the fluid up top..or if I just have something connected wrong..
John
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From: PNW
Vacuum Question
There are two places that fluid can come from. The presence of either indicates something is wrong. The two places are the vacuum modulator and the fuel pressure regulator. Since gas and ATF are very different in appearance and odor, it should be apparent what's what. These devices have diaphragms in them, and when the diaphragms fail, fluid can go past the diaphragm towards the vacuum source.
The PCV line might have some (not much) oil in it due to the fact that some of the oil mist in the vent line is bound to condense out on its way to the manidfold.
The PCV line might have some (not much) oil in it due to the fact that some of the oil mist in the vent line is bound to condense out on its way to the manidfold.
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Vacuum Question
Definately not gas..I was guessing tranny fluid..but it's hard to tell..I was also guessinh the cvacuum modulator..would this cause any tranny problems?..the tranny seems to be behaving..
Thanks
John
Thanks
John
Posting Guru
Joined: Apr 2000
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From: PNW
Vacuum Question
It may be behaving now, but it sounds like the leak is not too bad at this point. I think the leak is bound to get worse over time. You're losing fluid and that's not a good thing, so keep an eye on the fluid level until you get this fixed.
If I remember correctly, the modulator influences the shift points, so any change in behavior would be noticed as a change in the shift points (and possibly harshness). But if the diaphragm leaks more, then you'll notice smoke from the exhaust and could foul a plug (or plugs).
Bottom line is it's better to play it safe and get it fixed. It's a relatively inexpensive part to replace. Losing fluid and possibly running the tranny with too little fluid is not a good thing.
If I remember correctly, the modulator influences the shift points, so any change in behavior would be noticed as a change in the shift points (and possibly harshness). But if the diaphragm leaks more, then you'll notice smoke from the exhaust and could foul a plug (or plugs).
Bottom line is it's better to play it safe and get it fixed. It's a relatively inexpensive part to replace. Losing fluid and possibly running the tranny with too little fluid is not a good thing.
