What is this suppose to do
#1
Senior Member
Thread Starter
What is this suppose to do
2018 5.0 4100 miles
What exactly does this circlular junction of sorts under my hand in the first picture do? 4 lines meet here. I know one connects to the brake booster and on that same line another line goes off which runs to the vacuum resevoir box for the IWEs ,one goes to the intake, the other two somewhere around the engine. Is it simply a funky looking way to organize those lines or is it some type of breather or check valve?
Reason I ask because there is a noticeable non stop hiss from that plastic part that stops when I get my hands around it right. I’m having some intermittent dragging feel/ under powered type issues that seem to get better if I pump my brakes a bit at a stand still and as I said one goes to the brake booster. I’ve been waiting on some new part since January to replace this whole assembly but was curious if this part was actually functional in some way and maybe it’s not “leaking”. Before I made a big stink with Ford on the ridiculous wait on the part because my issues seem to be getting worse, I wanted to make sure I wasn’t waisting my time. Any help very much appreciated. I can post a video of the clear on and off hiss as I cover it up if needed. It’s very evident in the video as it’s so high pitched. Thanks!
Reason I ask because there is a noticeable non stop hiss from that plastic part that stops when I get my hands around it right. I’m having some intermittent dragging feel/ under powered type issues that seem to get better if I pump my brakes a bit at a stand still and as I said one goes to the brake booster. I’ve been waiting on some new part since January to replace this whole assembly but was curious if this part was actually functional in some way and maybe it’s not “leaking”. Before I made a big stink with Ford on the ridiculous wait on the part because my issues seem to be getting worse, I wanted to make sure I wasn’t waisting my time. Any help very much appreciated. I can post a video of the clear on and off hiss as I cover it up if needed. It’s very evident in the video as it’s so high pitched. Thanks!
Last edited by Zack23434; 03-21-2019 at 04:50 PM.
#2
Trying to figure it out!
This is a guess but the other pats I have seen that look like that are a check valve so your vacuum won't bleed down once the engine is shut off. If you take the hose off the you should be able to suck air through one side (or multiple depending on how it is set up) but not the other.
#3
Senior Member
Thread Starter
This is a guess but the other pats I have seen that look like that are a check valve so your vacuum won't bleed down once the engine is shut off. If you take the hose off the you should be able to suck air through one side (or multiple depending on how it is set up) but not the other.
If not I just wonder if it’s the reason I’m having these issues. I can’t understand how I’ve been waiting 3 months for this assembly.
#5
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#7
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Wrap several layers of electrical tape tightly around it and see if the hissing stops. Then drive it and see if your issues clear up. Note* Electrical tale can be removed pretty easily whereas duct tape cannot. That's why I suggest the electrical tape.