Ecoboost PCV issues

[MiWiAu]

What I did notice is that I can smell a strong whiff of fuel vapor when cold starting the car. I'm not sure where it is coming from. I can also detect a hint of the vapor seeping out somewhere from the JLT. It's a very faint scent, I have to practically stick my nose next to the JLT to smell anything. After driving the car hard for some WOT tune testing, I can smell the vapor fumes from the HVAC system. It makes the car smell a bit like the cats were removed.

I have read some comments from a couple people who vent their clean side to atmosphere that they notice an initial fuel/oil smell on startup or in the garage if the door is left closed for many hours. A check valve installed between the cleanside port and filter seemed to resolve this.

Mine is VTA as well (no check valve), but I don't recall smelling anything out of the ordinary, nor do I get any weird smells after hard running (other than my crappy glazed brakes, haha).


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[metroplex]

A check valve may not be the best approach as air needs to flow through the crankcase both ways depending on boost.

 

[MiWiAu]

A check valve may not be the best approach as air needs to flow through the crankcase both ways depending on boost.

That was my impression as well. However, when I first mentioned this idea to James @ TeamRXP, he said if you check valve the cleanside, the temporary reverse burps would just blow out the dirty side into the can.

I know cleanside is primarily an intake, but I don't know what % of the time flow is moving in the reverse direction. Seems, though, burping into the can would be best case as far as catching contaminants. Not sure of effects on crankcase pressure.


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[metroplex]

How much oil comes out of the cleanside? I've only seen hints of oil droplets on the fittings and nothing on the filter. I'm wondering if it is even worth the effort.

 

[ZSHO]

How much oil comes out of the cleanside? I've only seen hints of oil droplets on the fittings and nothing on the filter. I'm wondering if it is even worth the effort.

Its from my understanding that roughly 10% is omitted through the front cleanside under boost so expect to see negligible results as far as any such oil passing thru the front cleanside especially if recently installed as you mentioned above. Z

 

[SHOdded]

Super Six Motorsports take on PCV bypass - breathers are GOOD.