UPR Catch Can issues - throwing errors PCV

[GrizzlyBark]

Hi guys,

Wanted to check if anyone has experienced issues with catch cans?
I have recently bought the dual valve oil catch can from UPR (https://www.uprproducts.com/24-25-f...l-dual-valve-oil-catch-can-w-css-plug-n-play/).

At high speeds and higher gears (5) in Baja mode I suddenly get loss of power, the check engine light appears and starts to flash. I thought it was misfires but Dealer telling me it is the PCV error code. They said once I remove the catch can this issue will go away.

Anyone faced this? Shame to spend $$ on the UPR catch can only for it to not work correctly with our engines.

Just of note - this is when I am dune bashing at 80+ km/h in Baja mode only. In normal driving mode on the highway there are no issues.

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[Catalyst]

I have the single valve OCC from UPR. You sure you got the hose routing correct? Hard for me to tell in your photo, but zooming in it almost looks like you have the directional check valve installed on the wrong catch can connection (should be side - closest to passenger fender outside of North America RHD, and it appears to be on the "top" most port):

From their install instructions for the dual valve: 5030-299-1-CSS.pdf

"The top fitting on the catch can is the inlet from the PCV. Connect this hose to the PCV fitting on the passenger side valve cover. The side fitting will connect to the intake manifold. The arrow printed on the check valve in the hose connecting to the intake manifold must face away from the catch can."

"The third hose is the Wide Open Throttle hose (WOT). It will have a straight fitting on the catch can end and will have a check valve in the length of the hose. Be sure the Arrow printed on the check valve faces away from the catch can. Connect the hose to the catch can and route it towards the passenger side turbo inlet tube. It is the lower rubber tube connected to the air box."

 

[HyperM3]

I have the single valve OCC from UPR. You sure you got the hose routing correct? Hard for me to tell in your photo, but zooming in it almost looks like you have the directional check valve installed on the wrong catch can connection (should be side - closest to passenger fender outside of North America RHD, and it appears to be on the "top" most port):

What he said. I just looked at my install pictures and it looks like you have the hoses connected wrong. The one with the check valve should be the outer connection on the can, and the one without the check valve connects to the center of the can.

 

[GrizzlyBark]

I have the single valve OCC from UPR. You sure you got the hose routing correct? Hard for me to tell in your photo, but zooming in it almost looks like you have the directional check valve installed on the wrong catch can connection (should be side - closest to passenger fender outside of North America RHD, and it appears to be on the "top" most port):

From their install instructions for the dual valve: 5030-299-1-CSS.pdf

"The top fitting on the catch can is the inlet from the PCV. Connect this hose to the PCV fitting on the passenger side valve cover. The side fitting will connect to the intake manifold. The arrow printed on the check valve in the hose connecting to the intake manifold must face away from the catch can."

"The third hose is the Wide Open Throttle hose (WOT). It will have a straight fitting on the catch can end and will have a check valve in the length of the hose. Be sure the Arrow printed on the check valve faces away from the catch can. Connect the hose to the catch can and route it towards the passenger side turbo inlet tube. It is the lower rubber tube connected to the air box."

Good catch! I had a garage install it for me and must have missed it.

Have swapped them around and will try it out over the weekend

Will update you guys 🫡

 

[GrizzlyBark]

Scratch that, went to double check everything but looks like everything was done correctly.

Maybe because this is a dual valve set up it’s causing this issue? As others have the single valve.

 

[Roverhound]

I have the dual set up and don't have any issues.

 

[a77cj7]

I’ve got the dual valve setup on my truck. No issues for a few thousand miles now. Including baja runs before and after ford performance tune.

 

[GrizzlyBark]

Wish I didn’t have any issues!
I’ll try to video it tomorrow when I hit the dunes and share here.

 

[Catalyst]

Scratch that, went to double check everything but looks like everything was done correctly.

Maybe because this is a dual valve set up it’s causing this issue? As others have the single valve.

Your lines appear to be opposite of intended.

The line with the check valve is on the wrong port of the catch can and goes to the PCV it appears (eyeballing cause the cross over pipe blocks which line goes to PCV vs Intake Manifold). If you swap the two lines on both ends, your issues will go away. The one to the air inlet is correct and is the only difference with a dual valve vs. single.

The non check valve line goes from the central port on the catch can to the PCV (left connection when facing engine bay). The line with the check valve goes from the side port on the catch can back to the intake manifold (right connection when facing engine bay).

if you need a photo I can get one in a couple hours, but should be in those instructions I linked.

 

[GrizzlyBark]

Can you confirm? As that’s what I get from the instructions and other videos online

here is how mine are connected

 

[Catalyst]

Here are some pictures to help me explain. From the catch can to the PCV and intake manifold are matched up right in your drawings on your photo, but the lines are not correct.

In my pictures here, notice the line with the check valve (circled in yellow) goes from the side of the catch can back to the intake manifold (Red arrows) and the line without the check valve (Green arrows) from the PCV to the central inlet on the catch can. Also ensure the arrow on the check valve is pointing away from the catch can.

That check valve is a one-way valve and currently you are preventing the PCV from ventilating. The check valve is there to only allow the return pressure from the OCC back to the intake manifold (normally the OE line runs from the PCV to the intake manifold).

 

[GrizzlyBark]

Ah! Got it man thanks!

 

[Catalyst]

Ah! Got it man thanks!

No problem!

 

[GrizzlyBark]

Hi guys, I hit the dunes yesterday and got to 80 miles per hour at one point.
No PCV errors - all works just as intended.

Cheers again for your help.

 

[AlpineBike]

The stock crank case ventilation system works just fine.
Throw this aftermarket crap in the trash where it belongs.

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