2013R
Drag Race Newbie
- Location
- Virginia Beach, VA
i have never heard of just disconnecting the rear O2 sensor in 12 years of owning GTI's. very interesting thought though.
i have never heard of just disconnecting the rear O2 sensor in 12 years of owning GTI's. very interesting thought though.
link to the facebook post so i can study it?
Copy&Paste here for non FB account folk pls.
Sent from my iPhone using Tapatalk
Copy&Paste here for non FB account folk pls.
Surprised you can’t just disable/turn it off like we do in Subaru world w Cobb AP mapping.PSA:
I wanted to make folks aware of a small issue and general recommendation I make for all stage 2 and higher cars I tune via Cobb. With catless, high flow catted, and O2 spacer downpipes, the ECU will slowly add extra fuel at heavy load and will end up running fairly rich over time. This is a function of the rear O2 sensor being used to determine cat efficiency. Since the factory cats are not in place, it gets confused and continues to add fuel.
I have made Cobb aware of the issue and hopefully we will have a software solution eventually. But in the meantime, I recommend that people unplug the rear O2 sensor and leave it unplugged. The easiest place to do it is under the hood at the firewall. You will find two connectors here... disconnect the black one only. After doing this, I also recommend reflashing your latest map to reset any learning the ecu has done. Once this is done, your air/fuel ratios will remain consistent. *** off road use only! ***
NO facebook(but dat burner account...)
PSA:
I wanted to make folks aware of a small issue and general recommendation I make for all stage 2 and higher cars I tune via Cobb. With catless, high flow catted, and O2 spacer downpipes, the ECU will slowly add extra fuel at heavy load and will end up running fairly rich over time. This is a function of the rear O2 sensor being used to determine cat efficiency. Since the factory cats are not in place, it gets confused and continues to add fuel.
I have made Cobb aware of the issue and hopefully we will have a software solution eventually. But in the meantime, I recommend that people unplug the rear O2 sensor and leave it unplugged. The easiest place to do it is under the hood at the firewall. You will find two connectors here... disconnect the black one only. After doing this, I also recommend reflashing your latest map to reset any learning the ecu has done. Once this is done, your air/fuel ratios will remain consistent.
Surprised you can’t just disable/turn it off like we do in Subaru world w Cobb AP mapping.
Yep I asked for that a long time ago. But the VW team has a lot on their plate.
— Ed
Do tell!!Yep I asked for that a long time ago. But the VW team has a lot on their plate.
— Ed
Interesting. I have yet to catch it targeting anything other than what the tune has set for lambda at full load. Like, how long of a period until you start seeing things. Weeks, months? I think it's a Vibrant 200cell but I also have a bigdaddiesgarage minicat in front of the o2 sensor. I wonder if that's why it remains happy.....