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Tech & Fab
Pcv negative pressure?
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<blockquote data-quote="Rjhoward32006" data-source="post: 608838" data-attributes="member: 4043"><p>Yes on a 22re there are ports behind the afm that are non vaccum ports, for this reason. If you take the hose before it it sucks ambient air in and goes through pcv creating an unmetered air fuel mixture, the idle changes dramatically and it isnt happen. Same happens if you take the oil cap off yada yada yada. And most people dont realize this because the dipsticks and everything else leak air and are not sealed properly. And on a stock 22re the front valve cover hose runs to one of these post afm non pressure ports but when you flip it fills the intake and cylinders plus it takes away your vaccum affect and causes a positive crankcase pressure not enough to be badly concerned with but over time causes seals and such to leak. </p><p></p><p>I want negative pressure, i just dont if i have too much.</p><p></p><p>Thought someone might have played with this before.</p></blockquote><p></p>
[QUOTE="Rjhoward32006, post: 608838, member: 4043"] Yes on a 22re there are ports behind the afm that are non vaccum ports, for this reason. If you take the hose before it it sucks ambient air in and goes through pcv creating an unmetered air fuel mixture, the idle changes dramatically and it isnt happen. Same happens if you take the oil cap off yada yada yada. And most people dont realize this because the dipsticks and everything else leak air and are not sealed properly. And on a stock 22re the front valve cover hose runs to one of these post afm non pressure ports but when you flip it fills the intake and cylinders plus it takes away your vaccum affect and causes a positive crankcase pressure not enough to be badly concerned with but over time causes seals and such to leak. I want negative pressure, i just dont if i have too much. Thought someone might have played with this before. [/QUOTE]
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