Bad PCV valve?
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Senior User
Joined: Jan 2006
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From: Leesburg, Ga
Bad PCV valve?
94 F150 5.0 2wd
There is a hose that runs toward the cab off the air intake tube to the intake manifold...When I pulled that off, I really had poor vacuum...Shouldn't it atleast hold a small peice of paper?
Also, I have recently developed a front deal and rear seal leak...I know a bad PCV can cause those...Bottom line I don't think I have the crankcase vacuum I should have...I pulled the PCV and it has "some" pressure, but not much..
I tested the topend for a vacuum leak with carb cleaner, and nothing was noted...Any thoughts?
There is a hose that runs toward the cab off the air intake tube to the intake manifold...When I pulled that off, I really had poor vacuum...Shouldn't it atleast hold a small peice of paper?
Also, I have recently developed a front deal and rear seal leak...I know a bad PCV can cause those...Bottom line I don't think I have the crankcase vacuum I should have...I pulled the PCV and it has "some" pressure, but not much..
I tested the topend for a vacuum leak with carb cleaner, and nothing was noted...Any thoughts?
Posting Guru
Joined: Jun 2004
Posts: 1,781
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From: Central NY
Vacuum come from the intake manifold, put the tube back on. it sounds like you have alot of other vacuum leaks to find, don't forget to check the hardline vacuum lines too.
You should roughly 20 mmhg at idle
You should roughly 20 mmhg at idle
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Senior User
Joined: Jan 2006
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From: Leesburg, Ga
Originally Posted by water 5
you took the hose off the (tree) on the intake and the hose was still attach to the pcv when you did the paper test?
Two different hoses I'm talking about, but operationally connected?
Concerning your quote...I don't think those hoses on the tree attach to the PCV, do they?...I'll look again...
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