Valve Cover ??? (does it have an empty vacuum nipple?)

[Redshiba63]

Today I took off the TB and the fuel Injectors and did a real good cleaning on them.
This car has 36,600 miles and these things were very dirty. While it was apart I dumped some Sea Foam into each cylinder through the Injector holes. I put everything back together and the car is running 100X better now.

I was having a bad miss when it was Idling. When I started the car it smoker like it was on fire until all of the crud and Sea Foam burned out.

My question is?????
There is a small Vacuum nipple in the Valve cover and I do not have a loose line to connect to it. I do not remember removing anything from this nipple. This connector (Nipple) is right next to the larger hose on the left (While standing in front of the car looking at the motor) back side of the Valve cover directly across from the TB.
Can anyone tell me what is supposed to connect to this nipple?

Thanks!!

[ontarian_frog]

nothing connects to it, there should be a black rubber plug on it. That's where I hooked my vacuum gauge to.

[Redshiba63]

Thanks! I plugged it when I buttoned things up, I guess that is how I will leave it.

[YellowAveo]

Is this the nipple? I found the same thing on my 2004 Aveo 1.6L SVM (Manual, no-A/C). Before I cleaned it up there sure seemed to be a good deal of rather dry, (not oily) black gunk in the general area. I've also noticed some corrosion (white, powdery) on some of the metal parts. I wonder if this open nipple has allowed blow-by to enter into the engine compartment hence the gunk and corrosion. Also wonder if it lessens the effectiveness of the pcv system. Anyone know what it is for? And are you sure that, in the absence of any obvious use, it is best to plug it? Thanks in advance for the help.

[aveodude]

nothing connects to it, there should be a black rubber plug on it. That's where I hooked my vacuum gauge to.

[YellowAveo]

Thanks aveodude, but does anybody know whether this being open would have affected the pcv system's effectiveness and maybe caused internal gunk build-up? Or should I just plug it and forgeddaboudit already?

[YellowAveo]

Spoke with a friend this morning and he suggested that maybe ALL valve covers were CAST the same way and that MAYBE this hole was then DRILLED out only for certain models. I do not have any sophisticated way to check for vacuum or exhausting other than my finger or a piece of paper in front of the hole, using these there did not seem to be any noticeable air movement.

On the advice of my friend (Can''t believe I didn''t think of this duh!) I straightened out a paper clip and tried to push it into the hole. It went in about a 1/4 inch and hit SOLID! I don''t know why some engines would have this plugged and some not, but it appears that in my case this is a non-issue.

[mikedudley17]

nothing connects to it, there should be a black rubber plug on it. That's where I hooked my vacuum gauge to.

y u laughin?

[aveodude]

I was laughing because a vac gauge is ****ing pointless on this car. It is just a needle to watch go back and forth. Perfect example of rice. Plus, it is not the correct spot to put it. The point of the gauge is to see how hard your engine is trying to breathe so you would want it somewhere between the throttle body and the head(i.e. intake manifold)

[ontarian_frog]

I was laughing because a vac gauge is ****ing pointless on this car. It is just a needle to watch go back and forth. Perfect example of rice. Plus, it is not the correct spot to put it. The point of the gauge is to see how hard your engine is trying to breathe so you would want it somewhere between the throttle body and the head(i.e. intake manifold)

That was my mistake, it is on the throttle body. As for it being useless, I wouldn't say so. Great to get better economy out of the engine. Plus if you know how to read one you can detect problems with the engine. Do your homework before bashing ideas.