pcv valve information sought.
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Mountain Pass
Joined: Oct 2004
Posts: 139
Likes: 12
From: Orting
pcv valve information sought.
Does anyone know how much draw a pcv valve should have on a 64 f100 with a 223 engine? Mine at idle has 19 inches of manifold vacuum. but if I plug the pcv valve it goes to 21 inches. Losing 2 inches seems like a lot to me at idle does anyone know if this is normal?
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
Remember the PVC is pulling gases out of the crankcase to help seal the rings better and cut down on the amount of excess gas pressure that can cause oil seals to leak. The loss of vacuum is not anything to get excited about unless the engine wont run in gear.
