Crank case ventilation disconnected code

[thxultra]

I have a upr duel valve catch can installed. Today I got a check engine light when I looked up the code it said crankcase ventilation disconnected. When I checked the hoses they appear to be connected correctly. Does anyone know why I'm getting this code? I also never get any oil in my catch can. I have had it on for a couple thousand miles so strange I got the error just now.Thanks for the help. I had the catch can professionally installed as well.

Sponsored

 

[Juben]

I'd ensure that the check valves are pointed in the correct direction and also that the hoses are attached at their correct locations.

Sent from my XT1095 using Tapatalk

 

[thxultra]

I'd ensure that the check valves are pointed in the correct direction and also that the hoses are attached at their correct locations.

Sent from my XT1095 using Tapatalk

So I'm assuming the arrows point to the direction of air flow that will cause the valves to be open. Sorry this is a stupid question but my hoses don't have the arrows on them so I want to be sure. Thanks for the diagram also it is very helpful.

 

[Juben]

So I'm assuming the arrows point to the direction of air flow that will cause the valves to be open. Sorry this is a stupid question but my hoses don't have the arrows on them so I want to be sure. Thanks for the diagram also it is very helpful.

Those arrows are on the check valves. Look on those lines and you'll see them. Make sure the arrows are pointing in the direction as shown in the diagram.

Sent from my XT1095 using Tapatalk

 

[thxultra]

Those arrows are on the check valves. Look on those lines and you'll see them. Make sure the arrows are pointing in the direction as shown in the diagram.

Sent from my XT1095 using Tapatalk

I have looked on the check valves and never found the arrow. They are just solid black.

 

[ronv95]

I have looked on the check valves and never found the arrow. They are just solid black.

blow in them...

 

[thxultra]

blow in them...

Ya that is what I ended up doing and assumed the direction that I can blow through (direction valve opens) is the direction the arrow points. Is this correct?

 

[thxultra]

Ended up that UPR installed the valve backwards on the premade hose. Cables being premade I assumed they would be done correctly but guess I was wrong. Anyway posted this in case anyone else runs into this issue.

 

[Juben]

You want the arrow pointing towards the vacuum source because that's the way the air flows. Under boost (blowing in the direction against the arrow), the valve will close. It's always good to double check things like that, especially given the nature of this specific item. If the valve is reversed (arrow towards the catch can), it'd allow the crankcase to be pressurized (on a gutted PCV setup) and that would end very poorly.

I'm glad you got it figured out!

 

[thxultra]

You want the arrow pointing towards the vacuum source because that's the way the air flows. Under boost (blowing in the direction against the arrow), the valve will close. It's always good to double check things like that, especially given the nature of this specific item. If the valve is reversed (arrow towards the catch can), it'd allow the crankcase to be pressurized (on a gutted PCV setup) and that would end very poorly.

I'm glad you got it figured out!

Ya that is what the mechanic said. I had it installed for this reason and had them check it out. Is there anything I should do since I drove it a couple of thousand miles this way? Hopefully I didn't do any damage to the car.

 

[Juben]

Ya that is what the mechanic said. I had it installed for this reason and had them check it out. Is there anything I should do since I drove it a couple of thousand miles this way? Hopefully I didn't do any damage to the car.

Are you running on a gutted PCV setup? If so, I'd upgrade the check valve on the clean side line (running from the can to the intake manifold) to a Boomba valve. The check valve on the turbo inlet vacuum source isn't going to be a concern as it should theoretically never become pressurized.

 

[thxultra]

Are you running on a gutted PCV setup? If so, I'd upgrade the check valve on the clean side line (running from the can to the intake manifold) to a Boomba valve. The check valve on the turbo inlet vacuum source isn't going to be a concern as it should theoretically never become pressurized.

I'm just running the stock PCV setup. What is the advantage of the gutted setup? Sorry I'm new to this...

 

[Juben]

I'm just running the stock PCV setup. What is the advantage of the gutted setup? Sorry I'm new to this...

Most people run the gutted setup because the car will smoke when you go catless. Some people's cars do it really bad and other's cars barely do it at all. Mine did it twice throughout my time with the factory PCV and that was after idling for a long period of time, like 15 minutes in the drive-thru at Chick-fil-a during Mustang Week.

In any event, I think you're okay because the factory PCV still acts as a check valve and wouldn't allow the crankcase to become pressurized. Trust me, if it had gotten pressurized, you'd have known it before a few thousand miles.

Also, don't be sorry about asking questions. That's what we're all here for. Everyone has to start learning somewhere.

 

[thxultra]

Most people run the gutted setup because the car will smoke when you go catless. Some people's cars do it really bad and other's cars barely do it at all. Mine did it twice throughout my time with the factory PCV and that was after idling for a long period of time, like 15 minutes in the drive-thru at Chick-fil-a during Mustang Week.

In any event, I think you're okay because the factory PCV still acts as a check valve and wouldn't allow the crankcase to become pressurized. Trust me, if it had gotten pressurized, you'd have known it before a few thousand miles.

Also, don't be sorry about asking questions. That's what we're all here for. Everyone has to start learning somewhere.

Awesome man thanks again for all your help!!! Wish I could go catless but Illinois sucks and they will notice when you go for emissions testing... :( Upgraded exhaust though is tempting!!! Damn mod bug!!!! Want a better intercooler and radiator also since I have a non PP car.

 

[JStang15]

Just got the P04DB code and CEL last night. I installed the dual valve CC 2 weeks ago and the CSCC this past weekend. I double checked my connections and everything looks good. I've already gotten a little accumulation in the dual valve can and I'm pretty sure my check valves are in the right direction, but I'll double check. I may just end up having Adam turn off the CEL in the tune. Still annoying though.

Sponsored