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Engine Pcv delete questions

  • Thread starter Thread starter AnthonyA1234
  • Start date Start date Mar 13, 2022
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AnthonyA1234

5 Year Member
Aug 17, 2020
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Mar 13, 2022
#1
  • Mar 13, 2022
  • #1
So I recently purchased a 1992 gt. I just got the car running and have been tuning it up. I went to replace the Pcv valve and crank case filter but then noticed that the T that the Pcv valve line goes into was covered off and the hole the line was supposed to go into on the right side of the intake manifold did not have anything going in it. The car has an x303 cam and “mainly cobra parts in the top end” according to the previous owner. It has a cobra intake manifold. My question is should I keep it the way it is, is it better off deleted? Or should I buy the tube that is missing and replace the valve and filter as I planned. The engine doesn’t even have a breather on it like I know people usually do when they delete the Pcv system. Here’s some pics to show you what I’m talking about. I know it’s hard to see but in the second picture you can see that T fitting that has them been covered on the right side and in the third pic you can see how there is no tube going in the hole. Any info will be much appreciated. Thanks in advance.
 

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limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
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Mar 14, 2022
#2
  • Mar 14, 2022
  • #2
Positive Crankcase Ventilation valves are a good thing to have in a street car..... My opinion...
 
Reactions: AnthonyA1234

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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#3
  • Mar 14, 2022
  • #3
If you pull the upper intake you will prolly find it's plugged into a port underneath.
 

AnthonyA1234

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Aug 17, 2020
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#4
  • Mar 14, 2022
  • #4
General karthief said:
If you pull the upper intake you will prolly find it's plugged into a port underneath.
Click to expand...
So I don’t need that tube that is plugged off? Or should I go ahead and reattach that
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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#5
  • Mar 14, 2022
  • #5
If you're talking about the plug in the upper intake that is above the valve cover, that is where it's supposed to go but some times you need to get a spacer to raise the upper to make room for a fitting, as long as it is attached to a vacuum port it will work fine.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,167
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Mar 14, 2022
#6
  • Mar 14, 2022
  • #6
Here's how the Cobra intake should be plumbed. Looks like the line to the lower plenum is missing

 
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AnthonyA1234

5 Year Member
Aug 17, 2020
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Mar 14, 2022
#7
  • Mar 14, 2022
  • #7
General karthief said:
If you're talking about the plug in the upper intake that is above the valve cover, that is where it's supposed to go but some times you need to get a spacer to raise the upper to make room for a fitting, as long as it is attached to a vacuum port it will work fine.
Click to expand...
Ok so then I guess it must go into a vacuum port because if they all were truly deleted with no breathers anywhere then I would get leaks correct? I guess I’ll just change the Pcv valve and the filter as I was going to since I assume that other line in the T valve is going to a vacuum port. Thanks
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
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#8
  • Mar 14, 2022
  • #8
I would pull the upper and replace the rubber vacuum lines, if you can route the pcv line where it's supposed to go do it, you'll be surprised at difference when you replace those hard, brittle vacuum lines with good tight fitting stuff.
 

AnthonyA1234

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Aug 17, 2020
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Mar 14, 2022
#9
  • Mar 14, 2022
  • #9
General karthief said:
I would pull the upper and replace the rubber vacuum lines, if you can route the pcv line where it's supposed to go do it, you'll be surprised at difference when you replace those hard, brittle vacuum lines with good tight fitting stuff.
Click to expand...
so I was able to find the fitting on eBay I’m just looking for the tube now. I’ll check when I get home if there is enough clearance for the fitting like you said. Yea whenever I take the upper off I’ll for sure change all those old tubes
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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#10
  • Mar 14, 2022
  • #10
I think I've asked this before but where are you at in FL?
 

AnthonyA1234

5 Year Member
Aug 17, 2020
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#11
  • Mar 14, 2022
  • #11
Miami
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,829
10,509
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polk county florida
Mar 14, 2022
#12
  • Mar 14, 2022
  • #12
Aggggg, sorry to hear that , oh well, gotta live someplace
pM me if you need any little bits or pieces, I have stuff.
 
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AnthonyA1234

5 Year Member
Aug 17, 2020
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Mar 14, 2022
#13
  • Mar 14, 2022
  • #13
General karthief said:
Aggggg, sorry to hear that , oh well, gotta live someplace
pM me if you need any little bits or pieces, I have stuff.
Click to expand...
Do you have that tube?
 

AnthonyA1234

5 Year Member
Aug 17, 2020
669
111
63
Florida
Mar 14, 2022
#14
  • Mar 14, 2022
  • #14
limp said:
Positive Crankcase Ventilation valves are a good thing to have in a street car..... My opinion...
Click to expand...
Since my car has the x303 cam do you think I might get too much blowby if I reinstall that Pcv tube? Or should I be good
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,829
10,509
203
polk county florida
Mar 14, 2022
#15
  • Mar 14, 2022
  • #15
The pcv and the cam are unrelated things, one does not eliminate the need for the other and neither will be the cause of 'blowby'
Not having a PCV system will cause blowby,
If you are going to be working on your stang stick with us, we can help you do it right without all the bs the interwebs can provide.
Well, there is some bs here but it's all in fun.
 
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AnthonyA1234

5 Year Member
Aug 17, 2020
669
111
63
Florida
Mar 14, 2022
#16
  • Mar 14, 2022
  • #16
General karthief said:
The pcv and the cam are unrelated things, one does not eliminate the need for the other and neither will be the cause of 'blowby'
Not having a PCV system will cause blowby,
If you are going to be working on your stang stick with us, we can help you do it right without all the bs the interwebs can provide.
Well, there is some bs here but it's all in fun.
Click to expand...
Sounds good thanks man. I’ll head over to autozone and buy some Pcv tubing to reattach that connection
 

Boostedpimp

20+ Year Stangneter
May 8, 2003
1,451
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NJ
Mar 14, 2022
#17
  • Mar 14, 2022
  • #17
I would follow the pcv vac line that is connected and make sure it is to vacuum and if it is then your good. The fitting on the bottom above the valve cover is often not used due to clearance issues with various valve covers
 
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Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,167
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Massachusetts
Mar 14, 2022
#18
  • Mar 14, 2022
  • #18
BTW, that orange wire with the two butt-splive connections is your O2 sensor ground wire. You might want to make sure that connection is good and clean otherwise you might have some issues with how the car runs if that ground has a bad connection.
 
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AnthonyA1234

5 Year Member
Aug 17, 2020
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Mar 14, 2022
#19
  • Mar 14, 2022
  • #19
Mustang5L5 said:
BTW, that orange wire with the two butt-splive connections is your O2 sensor ground wire. You might want to make sure that connection is good and clean otherwise you might have some issues with how the car runs if that ground has a bad connection.
Click to expand...
will do thanks
 

AnthonyA1234

5 Year Member
Aug 17, 2020
669
111
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Mar 14, 2022
#20
  • Mar 14, 2022
  • #20
So I just ordered the fitting that connects to the manifold since it looks like I have plenty of clearance for it to fit. The hole it goes in currently has this piece in it. Is that what the fitting attaches to or did the person who plugged it put that?
 
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