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2015 Kia Optima
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Discussion Starter #1
What tube goes in and what goes out?
Found this while googling. Is it correct?
Screenshot_20200225-171410_Samsung Internet.jpg
 

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2011 Kia Optima
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Got a one way valve to install that comes with the kit?
The normal clean air actually flows from the air duct into the VC, but if there's a great amount of pressure to "blow" oil mist back into the tube, the dirty air flow from the VC to the intake tube.
Having said that, don't know if there's any problem attaching it the way you have it in the diagram, or the normal air flow is disrupted when the engine is trying to bring in clean air into the exit and out the enter into the VC.
The more I've pondered the setups, I'm inclined to just do away with the tube and install filter on the valve cover, or as I've stated before, just install a one way valve into the tube and that would allow fresh air to get into the engine, but the dirty mist couldn't get passed the valve.
 

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I was just curious whether there was a one way valve in the kit and the directions included.
There's the problem, as I can't see how a one way valve would work with an occ. If the one way valve was used with the arrow towards the vc as that is the clean air flow direction, then when the contaminated dirty air is blown back out of the vc into the tube, the air couldn't get through the one way valve, so why have an occ?
 

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2018 Kia Optima
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The instructions for the dual-out W3.3 OCC has one of the one-way valves pointed towards the air intake tube, and the other one-way valve pointed to the intake manifold. Curious as to why on the W3.3 a one-way valve is needed for OCC to intake manifold, given that on the W3 OCC no one-way valve is provided (i.e., not needed) for the same connection.
 

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The instructions for the dual-out W3.3 OCC has one of the one-way valves pointed towards the air intake tube, and the other one-way valve pointed to the intake manifold. Curious as to why on the W3.3 a one-way valve is needed for OCC to intake manifold, given that on the W3 OCC no one-way valve is provided (i.e., not needed) for the same connection.
On the clean side the replacement hose/tube runs from the air intake tube to occ then into the vc.
Just wanted to check as I wouldn't think there was a one way valve, but never thought I'd see a one way valve on the dirty side from the PCV valve, or actually in the exit line occ to intake manifold. Reason I say that, is that the PCV valve is a one way valve itself.
 

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I sent an email to ADD asking about why the need for the check valve from OCC to intake manifold on the V3.3 but not for the V3; guess I'll wait and see what they have to say.
 

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The ADD guy responded--"The V3 and V3.3 are two different design. The V3.3 check valve is for the dual vacuum sources. It'll choose the best vacuum source for the oil catch can."

Whether any of you agree with that assessment, that's up to you--I'm no OCC engineer so I can't prove or disprove his claim.
 

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The ADD guy responded--"The V3 and V3.3 are two different design. The V3.3 check valve is for the dual vacuum sources. It'll choose the best vacuum source for the oil catch can."

Whether any of you agree with that assessment, that's up to you--I'm no OCC engineer so I can't prove or disprove his claim.

Personally I think it's just an advertising gimmick and an easy way to incorporate the dual system with a way to connect something (hose) to the intake tube. To keep oil from entering the intake tube, some just use a plug on the intake tube and add a filter to the vc.
 

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I'm guessing maybe the OCC to air intake tube connection (with one-way check valve) is to introduce vacuum for when engine is at or near WOT; this is what I imagine the ADD engineers are banking on to ensure that a ton of blowby doesn't escape via the valve cover opening (back or side, depending on which 2.0T engine is in your Optima) when at/near WOT, and the breather filter element dongle at the valve cover is simply a just-in-case catch-all in case a bit of blowby still manages to escape from the valve cover.

If you think about it--if the reasoning for why a dual-inlet OCC like the V3.3 is beneficial is so that it can catch blowby from both PCV and valve cover, then you'd think they would have run the second inlet vacuum hose from the valve cover to the OCC as well, but clearly such is not the case here with the ADD V3.3--they are counting on the two check valves to ensure that the majority of blowby under all throttle conditions exits through the PCV to the OCC...at least that's my theory on how the V3.3 works.
 

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Just to add, the PCV valve is fully opened at wide open throttle.... It can't open any more to have the additional buildup of dirty air exit through the PCV valve, even if there were 5 hoses from the occ. The pressure builds and only place for it to go is into the intake tube or out the vc filter, if there is one.
 

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2016 Kia Optima SXL
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Drives me nuts that no printed definition of WOT states WHERE the gas pedal Can Be to achieve WOT.
1st instinct is - pedal "floored" all the way - But I'm thinking That is Not the Only way. True?
 

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Drives me nuts that no printed definition of WOT states WHERE the gas pedal Can Be to achieve WOT.
1st instinct is - pedal "floored" all the way - But I'm thinking That is Not the Only way. True?
Good morning and something to research while being confined, so:

Accelerator Position Sensor (APS)
▷ Type: Variable resistor type
▷ Specification


Output Voltage (V)
Accelerator
Position


APS1​
APS2
C.T
0.7 ~ 0.8
0.29 ~ 0.46
W.O.T
3.85 ~ 4.35
1.93 ~ 2.18​


There is redundant info so as no interruption of signal if one for some reason ceases. At home one could determine accelerator position while checking the particular sensor.
There is also specifications for pedal angle with vout/vin percentage- WOT 106 degrees.

Hope this helps.
 

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2012 Kia Optima SX-T
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FWIW: Check out GDI_Tech (I think that was his handle) in the these forums of the past. Very good and what I would consider accurate information on all of this.
 

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FWIW: Check out GDI_Tech (I think that was his handle) in the these forums of the past. Very good and what I would consider accurate information on all of this.

Surely it's this thread ....
 

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Got a headach from the lengthy writing, but I stopped after one had said that under wide open throttle the PCV valve is closed and pressure goes to the air intake.....That was enough for me.
 
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