Possibly bad pcv?
- Thread starter BCAV5
- Start date
PVC stopped up, gasket baked hard and needs to be replaced, vacuum leak going to the PVC.. possible vacuum leak elsewhere also causing PVC to not have enough vacuum.. or blowby from the rings and not a PVC issue at all.. is it using oil? What do the spark plugs look like?
Orl1mjf
New Member
Question, 94-95 have no breather. What’s been done to the engine
TrickVert
Active Member
^^^ What he said. ^^^
If there's a breather where your oil fill cap should be, then someone (the PO?) has monkeyed around with the system.
EDIT: And if so, it could be a contributing factor to this: Help!!! 94GT 3k idle
If there's a breather where your oil fill cap should be, then someone (the PO?) has monkeyed around with the system.
EDIT: And if so, it could be a contributing factor to this: Help!!! 94GT 3k idle
Orl1mjf
New Member
Take a picture of the engine so we can see what you are dealing with.
Orl1mjf
New Member
You have a breather where a cap should be. You probably need to verify if you’re pcv valve is there and hooked up properly and working before doing anything else https://www.google.com/search?clien...ient=mobile-gws-wiz-serp#imgrc=xLuqq0SG4QbKkM
ttocs
Forum's #1 poster
There is no breather in the 94/95. Unless he made some changes you very well could be getting unmetered air in the motor there. But this is an easy test just throw some tape over it or a bag and some rubber bands and we can find out.
TrickVert
Active Member
Yep. The previous owner tried to "fix" something that doesn't need fixing. 
The hose that runs from the intake tract to the nipple on the oil filler is present, and it looks like I see what appears to be the PCV hose running along/under the driver's side of the intake. If that's the case, then the breather is most definitely allowing unmetered air into the system, and is very likely the cause of your "hanging" idle.
If the PCV valve and hose are missing, you should replace them, and get an OEM oil cap. PCV present or being replaced, I would also pull the screen from the back of the intake and clean/replace it and replace the PCV grommet as well. The PCV system plays an important role in removing contaminants and moisture from the oil, and regardless of what you may read, is is not "just emissions crap."
The hose that runs from the intake tract to the nipple on the oil filler is present, and it looks like I see what appears to be the PCV hose running along/under the driver's side of the intake. If that's the case, then the breather is most definitely allowing unmetered air into the system, and is very likely the cause of your "hanging" idle.
If the PCV valve and hose are missing, you should replace them, and get an OEM oil cap. PCV present or being replaced, I would also pull the screen from the back of the intake and clean/replace it and replace the PCV grommet as well. The PCV system plays an important role in removing contaminants and moisture from the oil, and regardless of what you may read, is is not "just emissions crap."
Most chain auto parts stores have them: O’Reilly; AutoZone; NAPA... or whatever your local store is called.
Once you weather the storm, find out which of your nearest auto parts stores has one in stock. The oil cap is a screw-on type and is black in color with a yellow universal oil symbol on it.
https://www.oreillyauto.com/detail/.../ford/mustang?q=Oil+cap+1995+Mustang+gt&pos=0
Once you weather the storm, find out which of your nearest auto parts stores has one in stock. The oil cap is a screw-on type and is black in color with a yellow universal oil symbol on it.
https://www.oreillyauto.com/detail/.../ford/mustang?q=Oil+cap+1995+Mustang+gt&pos=0
Whenever you do get a chance to look into it, the PVC system helps keep sludge and goopage from accumulating under your valve covers and in the valley of the engine. I agree with previous replies, it's a very important part of your engine's breather system. I'm right now cleaning up a mess from mine's PO who left mine in a cobbled up mess and under the valve covers was a gooped up baked on mess.. If I left it that way instead of checking it out and cleaning it up the top end of mine would have been starved for oil and short of live for sure. The PVC system is very important and needs to work properly!
