Checking PCV's functionability

[Esky]

Hi all,

Some time back Eddie posted an article about the PCV and how it functions. It's supposed to control the airflow thru the engine cover, without which air will flow too much during low-rev and cruising (hi vacuum situations) and too little during hi-rev/floored throttle (low vacuum situations).

I tried disconnecting the hose connected between the air filter hose and the engine cover, and got this- hi flow during idling but almost no airflow during higher RPMs. Has my PCV failed? Or is the plunger/spring inside sticking? It should be the other way round, i.e. low volume of air being pulled into the engine cover and more air during higher rev. I checked both Iswaras at home and it was the same... can someone check their cars and see whether it's just me? Thanks!

[Turbobrick]

Function check of the PCV is simply placing your finger over the PCV inlet and if there's suction then it's ok

 

I recently changed Luna's PCV, partly blocked (like stuffy nose )

[Esky]

But there's almost no suction during anything higher than idling RPM... which worries me coz the engine top has no air flowing thru it to cool it down during cruising/WOT . That's like having no PCV!

 

So your car also the same situation ah?

[Turbobrick]

Well in that case change the PCV lah, cheap cheap part.

[Esky]

That's why I wanna find out from other kakis here whether what I'm experiencing now is normal or not... if normal then just leave it alone and find other parts of the engine to worry over!

[Forte3737]

IF this valve is clogged, oil consumption will increase

[Wacko]

IF this valve is clogged, oil consumption will increase

Wow, did you just dig an almost 12 years old thread?

[Forte3737]

Nowadays cars still use pcv valve and this item is one of the most neglected

Wow, did you just dig an almost 12 years old thread?