hobby-man
Senior Member
- First Name
- Mike
- Joined
- Jun 20, 2018
- Threads
- 50
- Messages
- 2,867
- Reaction score
- 2,739
- Location
- GTA
- Vehicle(s)
- 2021 WRX STi, 2018 Sport Touring Hatchback (sold)
- Build Thread
- Link
The defouler has nothing to do with it, the downstream O2 sensor doesn't control fuelling. It's just a measure of catalyst efficiency.did removing the defouler change anything?
Sponsored