pcv/idle question
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Senior User
Joined: Mar 2010
Posts: 459
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From: Fayetteville, NC
pcv/idle question
hey guys....
what would cause the pcv valve to pop/push out of the valve cover grommet ?
also having some rough idle and fuel mileage issues, can these be related ?
what would cause the pcv valve to pop/push out of the valve cover grommet ?
also having some rough idle and fuel mileage issues, can these be related ?
Senior User
Joined: Mar 2010
Posts: 306
Likes: 0
my best guess, not a very good one lol
i had something like that happen when my engine blew. some how the engine was building up an extreme amount of pressure and would blow it out after a couple minutes when it was warmed up. and my engine was toasted, somehow burned a whole completely threw the #8 piston. dont know how that causes pressure to build but thats what happened
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
As 302Flareside put it, there is high pressure in the head, and reluctantly enough it pushed the PCV valve out to help relieve pressure, before blowing gaskets and seals.
I would suspect the PCV valve could be failing, in which case I would remove and check to see if it's operating correctly. If you shake it and it doesn't rattle, either clean it out with some carb cleaner, solvent, etc. or get a new a Motorcraft one to replace the old one with.
I would suspect the PCV valve could be failing, in which case I would remove and check to see if it's operating correctly. If you shake it and it doesn't rattle, either clean it out with some carb cleaner, solvent, etc. or get a new a Motorcraft one to replace the old one with.
Fleet Owner
Joined: Oct 2005
Posts: 20,784
Likes: 1,751
From: Kentucky
I moved my PCV vacuum hose to the center vacuum tree on the intake a few years ago. I think somewhere around 1994 Ford made the change at the factory.
I suspect your PCV is plugged up. Combine that with a fair amount of crankcase pressure from blow-by, something has to give.
I suspect your PCV is plugged up. Combine that with a fair amount of crankcase pressure from blow-by, something has to give.
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