If you're seeing P0101, that doesn't apply to both banks. P0101 means the passenger side MAF sensor is sending an abnormal signal to the ECM. P010B would indicate the same problem on the driver's side.

I'd suspect your BOV installation is mucking up your MAF readings somehow, most likely due to an air leak somewhere in the installation.

 

I only started getting both codes after I got JB4, I was running just AMS intakes for a while, and never got any code. Still not sure what it is.

 

Sorry I have P010b too.

 

Thinking out loud here, but does this have anything to do with losing metered air using the atmosphere-dump style, rather than proper (with mass air system) recirculated BOV? This would of course then be an intermittent issue, although the code is stored.

 

Poor drivability is why I sold my kit. Below explains the details.

 

So, I took it all back apart replaced the pvc hoses and replaced everything with metal clamps.
Still the same issue with both sides of MAF. I unplugged JB4 and it does the same.
On the driver side it does sound like there may be some vacuum leaking but it has sounded like that since my initial install. I didn’t think to listen prior.
The leak seems to be coming from the left of the MAF below the manifold. Nothing there I removed, and I can feel anything or see anything.

I am debating on whether or not to remove the BOV altogether just to have this thing driveable, which in turn should tell me if I have a leak still theoretically.

 

Update.
I removed the BOV and two couplers. Kept the plumbing and just plugged the lines.

Well....everything is working again.

 

I figured it was the BOVs as I mentioned in post #2.

 

I installed some BOV HKS knockoffs.

^This is the real issue. Counterfeit HKS BOVs have been marketed by ebay resellers, so I'm not surprised you are having issues.

If you want to invest in BOVs, this week would be the time to buy non-counterfeit/legitimate BOVs from known Q vendors, such as Concept Z Performance:

I have not seen a better price on Q50/Q60 VR30 BOVs since they started to get offered in the marketplace.

Both HKS and Turbosmart do the job, with HKS reportedly giving you the more obnoxious "blow-off" sound vs Turbosmart, which is much more subtle.

 

^This is the real issue. Counterfeit HKS BOVs have been marketed by ebay resellers, so I'm not surprised you are having issues.

If you want to invest in BOVs, this week would be the time to buy non-counterfeit/legitimate BOVs from known Q vendors, such as Concept Z Performance:

View attachment 96672

I have not seen a better price on Q50/Q60 VR30 BOVs since they started to get offered in the marketplace.

Both HKS and Turbosmart do the job, with HKS reportedly giving you the more obnoxious "blow-off" sound vs Turbosmart, which is much more subtle.

Do these BOV's eliminate the issue with the MAF not getting the correct readings? There is a video on this thread and the guy is explaining that BOV's on a MAF car will always throw codes? I'm new to such a new turbo'd car so I'm still trying to understand some of this stuff

 

They can offer a benefit if your car likes them. Mine did not. If you have an Ecutek tune it helps with throttle slam shut compressor surge by cracking open the throttle blades when you are in boost and suddenly get off the throttle. Bottom line is non recirculating BOV units are just not ideal.

 

I was going to go with the JB4. I only wanted to squeeze a couple more ponies out of the motor. My plan was JB4 and OCC I like the way BOVs sound so that was something I was considering until I read a few threads saying they COULD cause trouble. We will see after the JB4 and OCC where I'm at, thank you for the info !

 

Good discussion thread on BOVs - not all points are relevant to running a BOV on a VR30, since our engine does not have a factory BPV, but other points are worthwhile:

Blow Off Valve FAQ: Read if you are thinking of buying one! - NASIOC

 

Had my Z1 Bov kit professionally installed. No issues whatsoever...

 

P0101 is indicating an out-of-spec low or high frequency signal from the MAF sensor to the ECM on the passenger side. P010B would be for the driver's side MAF. I would have tried using MAF cleaner first before replacing them. Wiping isn't enough. I don't know if it is necessary to replace both MAFs if you're not getting a DTC for the driver's side MAF but if it has oil on it as you indicated, then I'd try properly cleaning both MAFs first before replacing either.