93 XLT 4wd Loud Hissing from intake and stalling

[LOHRTBT]

Ok..so yesterday I start the exp.. as soon as I do I hear a small POP...then it starts idling funny and making a loud hissing noise * vaccuum leak im sure * so I open the hood up..on the back right of the intake. There is an open line that I assume popped off but I see no loose lines anywhere. Its on the little piece that screws into the side of the intake with like 3 or 4 vaccuum lines going to it and it also leads over to the master cylinder. What is this peice called?? I have looked in Chiltons*WASTE OF TIME* and it shows a pic of it but never said what it was. O'Reillys had no idea what it was either.

Does this simply sound like a vaccuum leak or maybe the module has a problem?? Thanks for any assistance!

 

[xmodster3o3]

What you need is a vaccuum plug, I always keep spares in my X, just go to the auto store and pick up a vaule pack there sure to have your size plug.

 

[Positive Vibes]

I had the same thing happen to me. I looked and looked to find where the hose connected. Could't find anywhere to connect it. So I stuck a screw in it to plug it and walla she ran fine. So if you cant find where it connects just plug it and see how she runs.

 

[LOHRTBT]

Did that first off....guess I should have said that too haha. Went and got a plug..fixed the idle problem about 50% but still hissing...only when Idling or when I hit the gas pedal while driving. Can hear it hissing when I drive.

 

[LOHRTBT]

and WHAT IS THE NAME of that part hahaha. No one seems to know! LOL

 

[Positive Vibes]

The vacuum manifold?? Sounds like you still have a leak. Maybe two lines were blown off. I would get a buddy to rev the engine while you listen for the leak.

 

[LOHRTBT]

Will do that...but still dont know what that part is that all the vac lines attach to.

 

[Positive Vibes]

Will do that...but still dont know what that part is that all the vac lines attach to.

I call it the "vacuum manifold" not sure what Chiltons calls it. Does it really matter??

 

[LOHRTBT]

Yes...in case the actual part needs replaced, I usually tend to belive that stuff happens for a reason. So if it caused a line to blow off ...maybe it is the problem...it could have also been some freak thing, but just in case I would like to know what its called in case I need to replace it. Know what I mean?

 

[Glacier991]

It's is often referred to as the Octopus, but of course that's not what it's called. And yes this is a common problem. I keep a set of plugs in the glovebox. There is one fitting on it that is almost hidden by the others, and easily overlooked.

 

[provincelander]

Vacuum leak

Its called a vacuum tree or port. My wifes did the same thing twice, sealed it and all is OK.