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2022 Kia Forte GT, 2013 Kia Soul +, 2023 Kia Soul EX,1992 Toyota Corolla, 2021 Kia Sportage SX
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Discussion Starter · #1 ·
So I installed the GFB Respons BOV, and almost immediately got a CEL. Now I know some folks were having an issue when it was left to 100% vent, which I did at first not knowing this. So I closed it to about 50/50, cleared the code, still getting a CEL. At first I was also loosing boost after about 20 minutes of driving, was great in the first 20 minutes, but then it dropped. Now that I have it at 50/50, I'm still getting the CEL, and it's dropping boost after about an hour of driving.

Anyone else run in to this, or know what is going on here?

I have been trying to look this up, and everyone else fixed this by not leaving it to full vent, this however did not work in my case.

Thanks in advance!
 

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2021 Forte GT w/GT2, Currant Red, Wagner-Tuning Intercooler, Evilla Exhaust, Takeda S1 Intake
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You're getting a CEL - but what is the actual trouble code?
 

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2022 Kia Forte GT, 2013 Kia Soul +, 2023 Kia Soul EX,1992 Toyota Corolla, 2021 Kia Sportage SX
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Discussion Starter · #3 ·
I can't remember what the numbers are but it's the one for the recirc valve giving an abnormal reading. It's the same one everyone gets when they leave the GFB BOV on full vent.
 

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2022 Kia Forte GT, 2013 Kia Soul +, 2023 Kia Soul EX,1992 Toyota Corolla, 2021 Kia Sportage SX
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Discussion Starter · #4 ·
Just pulled it again so I could remember the code P2261
 

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2020 KIA Forte GT Manual
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Are you using the stock RCV solenoid? The stock one may not provide the response and air volume needed to actuate the aftermarket BOV. I use a Pierburg solenoid from N75 Motorsports.
 

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Discussion Starter · #6 ·
Are you using the stock RCV solenoid? The stock one may not provide the response and air volume needed to actuate the aftermarket BOV. I use a Pierburg solenoid from N75 Motorsports.
I am yes, that makes perfect sense. Next question, and this may seem stupid but I've never dealt with this before, where is the solenoid and where does it go?
 

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I am yes, that makes perfect sense. Next question, and this may seem stupid but I've never dealt with this before, where is the solenoid and where does it go?
It's on the intercooler pipe. Just follow the vacuum line from the BOV and it will lead you to it.
 

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2022 Kia Forte GT, 2013 Kia Soul +, 2023 Kia Soul EX,1992 Toyota Corolla, 2021 Kia Sportage SX
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Discussion Starter · #8 ·
It's on the intercooler pipe. Just follow the vacuum line from the BOV and it will lead you to it.
Thank you! Gonna order it this weekend.
 

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2021 Forte GT w/GT2, Currant Red, Wagner-Tuning Intercooler, Evilla Exhaust, Takeda S1 Intake
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Are you sure your GFB Respons BOV is sealing? The code is for not building pressure - is the valve working right? Could be sticking open.
 

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Discussion Starter · #10 ·
As far as I can tell? I don't HEAR any leaking boost when the code happens, or when it looses boost. Not like when I didn't have the clamp tight enough on the intercooler reso delete pipe installed, that you could CLEARLY hear the boost leaking. And it seems to change when I adjust how much I am venting. When set to full circulate, I get a longer stint of driving with boost, set to full open, I get about 15 minutes. 50/50 I get about an hour. Now if I drive it easy at 50/50, it doesn't do this, but after an hour, if I get on it, I lose boost almost immediately after I hear the valve open and vent. It is very similar to when you cold start the car and have no boost till it warms up.
 
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As far as I can tell? I don't HEAR any leaking boost when the code happens, or when it looses boost. Not like when I didn't have the clamp tight enough on the intercooler reso delete pipe installed, that you could CLEARLY hear the boost leaking. And it seems to change when I adjust how much I am venting. When set to full circulate, I get a longer stint of driving with boost, set to full open, I get about 15 minutes. 50/50 I get about an hour. Now if I drive it easy at 50/50, it doesn't do this, but after an hour, if I get on it, I lose boost almost immediately after I hear the valve open and vent. It is very similar to when you cold start the car and have no boost till it warms up.
There is going to be a million different opinions on this one... but it’s been proven and solved by replacing the Mac style valve with a pierburg solenoid... GFB valves don’t work properly with a Mac style valve. 2261 is the dead giveaway that’s the issue.
 
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Discussion Starter · #13 ·
Yep that is it, I didn't see that before ordering and installing the BOV. After I get the solenoid it's going down to my buddies shop and he is going to do a tune on it. Pretty excited.

He also has a new fast spooling turbo as well as his own patented anti lag he invented he said I could just have.
 
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Yep that is it, I didn't see that before ordering and installing the BOV. After I get the solenoid it's going down to my buddies shop and he is going to do a tune on it. Pretty excited.

He also has a new fast spooling turbo as well as his own patented anti lag he invented he said I could just have.
If that “ invention” works ya might want him to drop by here.. he can make some easy money.
 

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The factory-installed unit might not deliver the responsiveness and air volume required to activate the aftermarket BOV. N75 Motorsports' Pierburg solenoid is what I use.
 

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Discussion Starter · #17 ·
If that “ invention” works ya might want him to drop by here.. he can make some easy money.
Apparently my car is going to be the test car for it, so we will see!
 

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Discussion Starter · #18 ·
m running the Same BOV at 50/50 on my 22. Never an issue with mine.
Is your car DCT or manual? I am wondering if the folks that aren't having the issue have the DCT? In any case I'm ordering the solenoid today.
 

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2022 Kia Forte GT2 Steel Grey
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Is your car DCT or manual? I am wondering if the folks that aren't having the issue have the DCT? In any case I'm ordering the solenoid today.
Before I got the GFB I had a SXTH element that is 100% to atmosphere for about 6 weeks. No codes with it either. DCT... GT2
 

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Discussion Starter · #20 ·
No codes with it either. DCT
I am wondering if it is less of a problem with the DCT, mine is a manual and it's going to use that valve more often than on a DCT due to shift times. Not the first I've heard this happening either, just heard that it was when one had it on full vent. But like I was saying it doesn't matter if I am at full vent, 50/50 or full recirculate, it just changes the amount of time before I throw a code and lose boost.
 
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