what dose the pcv look like
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Joined: May 2009
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what dose the pcv look like
ok i went to change the pcv valve and the one the auto parts store sold me was not the same. the one on the car is black and it is see through. the new one has like something in when you shake it you can here it. whats the diff and will i be ok with the one that i got from the auto parts store.
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Joined: Dec 2001
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From: Glendale, AZ
You sure you pulled the PCV valve and not the elbow?
The PCV valve is on the left(driver) side of the intake manifold in the center. Many people pull the black breather elbow on the passenger side valve cover thinking it is the PCV valve.
The PCV valve is on the left(driver) side of the intake manifold in the center. Many people pull the black breather elbow on the passenger side valve cover thinking it is the PCV valve.
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Joined: Feb 2009
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From: Wesley chapel fl
I pulled the black elbo out of the pass side. There is nothing ealse there or on the drivers side. And I have drove it today will I mess something up.
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From: Hell was full so they sent me to NJ
Shoebox has a photo of the location of the PCV valve on the driver's side of the intake manifold.
http://shbox.com/1/pcv.jpg
On your 93, it will be different. 93/94 there is a U-shaped elbow that connects the end of the PCV valve to the vacuum nipple about 3" behind it on the manifold. 95-97 has a hose that runs to the front of the intake manifold. You can see the 93/94 setup in this photo of my engine:
http://www.injuneer.com/images/photo.../dOptivac1.jpg
The line on the passenger side of the intake, that runs from the throttle body to the valve cover, supplies the filtered air that the PCV system vacuum pulls down through the oil passage in the head, through the crankcase to pick up blowby, then up through the lifter valley to the bottom of the intake manifold, where it is pulled out through the PCV valve.
If you've read similar posts, you should have picked up the fact that if you have excessive ring blowby in the crankcase, or you have a non-functioning PCV valve, pressure will build in the crankcase, and the vapor will push up through the hose on the passenger side, picking up oil droplets along the way, and enter the throttle body, pooling oil in the top of the throttle body, under the cover. It will then drip down in front of the throttle blades, and enter the intake manifold, causing the black sludge.
A small accumulation of oil in the system is normal, over a long period of time. If you get a lot of oil, you have a problem with blowby, or the PCV system is not working. The presence of smoke would indicate a similar problem.
http://shbox.com/1/pcv.jpg
On your 93, it will be different. 93/94 there is a U-shaped elbow that connects the end of the PCV valve to the vacuum nipple about 3" behind it on the manifold. 95-97 has a hose that runs to the front of the intake manifold. You can see the 93/94 setup in this photo of my engine:
http://www.injuneer.com/images/photo.../dOptivac1.jpg
The line on the passenger side of the intake, that runs from the throttle body to the valve cover, supplies the filtered air that the PCV system vacuum pulls down through the oil passage in the head, through the crankcase to pick up blowby, then up through the lifter valley to the bottom of the intake manifold, where it is pulled out through the PCV valve.
If you've read similar posts, you should have picked up the fact that if you have excessive ring blowby in the crankcase, or you have a non-functioning PCV valve, pressure will build in the crankcase, and the vapor will push up through the hose on the passenger side, picking up oil droplets along the way, and enter the throttle body, pooling oil in the top of the throttle body, under the cover. It will then drip down in front of the throttle blades, and enter the intake manifold, causing the black sludge.
A small accumulation of oil in the system is normal, over a long period of time. If you get a lot of oil, you have a problem with blowby, or the PCV system is not working. The presence of smoke would indicate a similar problem.
Last edited by Injuneer; May 29, 2009 at 07:23 PM.
Thread Starter
Registered User
Joined: May 2009
Posts: 175
Shoebox has a photo of the location of the PCV valve on the driver's side of the intake manifold.
http://shbox.com/1/pcv.jpg
On your 93, it will be different. 93/94 there is a U-shaped elbow that connects the end of the PCV valve to the vacuum nipple about 3" behind it on the manifold. 95-97 has a hose that runs to the front of the intake manifold. You can see the 93/94 setup in this photo of my engine:
http://www.injuneer.com/images/photo.../dOptivac1.jpg
The line on the passenger side of the intake, that runs from the throttle body to the valve cover, supplies the filtered air that the PCV system vacuum pulls down through the oil passage in the head, through the crankcase to pick up blowby, then up through the lifter valley to the bottom of the intake manifold, where it is pulled out through the PCV valve.
If you've read similar posts, you should have picked up the fact that if you have excessive ring blowby in the crankcase, or you have a non-functioning PCV valve, pressure will build in the crankcase, and the vapor will push up through the hose on the passenger side, picking up oil droplets along the way, and enter the throttle body, pooling oil in the top of the throttle body, under the cover. It will then drip down in front of the throttle blades, and enter the intake manifold, causing the black sludge.
A small accumulation of oil in the system is normal, over a long period of time. If you get a lot of oil, you have a problem with blowby, or the PCV system is not working. The presence of smoke would indicate a similar problem.
http://shbox.com/1/pcv.jpg
On your 93, it will be different. 93/94 there is a U-shaped elbow that connects the end of the PCV valve to the vacuum nipple about 3" behind it on the manifold. 95-97 has a hose that runs to the front of the intake manifold. You can see the 93/94 setup in this photo of my engine:
http://www.injuneer.com/images/photo.../dOptivac1.jpg
The line on the passenger side of the intake, that runs from the throttle body to the valve cover, supplies the filtered air that the PCV system vacuum pulls down through the oil passage in the head, through the crankcase to pick up blowby, then up through the lifter valley to the bottom of the intake manifold, where it is pulled out through the PCV valve.
If you've read similar posts, you should have picked up the fact that if you have excessive ring blowby in the crankcase, or you have a non-functioning PCV valve, pressure will build in the crankcase, and the vapor will push up through the hose on the passenger side, picking up oil droplets along the way, and enter the throttle body, pooling oil in the top of the throttle body, under the cover. It will then drip down in front of the throttle blades, and enter the intake manifold, causing the black sludge.
A small accumulation of oil in the system is normal, over a long period of time. If you get a lot of oil, you have a problem with blowby, or the PCV system is not working. The presence of smoke would indicate a similar problem.
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
It won't "mess the car up". But it would be a good idea to put the elbow back in the valve cover, and put the PCV valve in the correct location on the driver's side of the manifold soon.
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Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
To check, pull the elbow out and plug up the hole in the valve cover. See if the idle changes?
A vacuum leak has to be fairly severe to cause high idle. A small leak will simply cause the PCM to close the IAC valve down and reduce flow through the idle air passage. Once the IAC valve is fully closed however ("0" counts), the engine will idle higher than spec due to a vacuum leak. You can check the IAC valve commanded position with an OBD-II scanner. That will tell you if the valve is fully closed and unable to control the idle.
A vacuum leak has to be fairly severe to cause high idle. A small leak will simply cause the PCM to close the IAC valve down and reduce flow through the idle air passage. Once the IAC valve is fully closed however ("0" counts), the engine will idle higher than spec due to a vacuum leak. You can check the IAC valve commanded position with an OBD-II scanner. That will tell you if the valve is fully closed and unable to control the idle.
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