wideband sensor measuring a/f mixture o2 sensor basically .
Sometimes if the probe is not positioned in the exhaust correctly it can give dodgy readings.
Anyway it's safer to run a/f of 12 or low at high rpm,dumping fuel cools cylinder walls.
From what i've heard certain well know vag "tuners" map very lean.
Sometimes if the probe is not positioned in the exhaust correctly it can give dodgy readings.
Anyway it's safer to run a/f of 12 or low at high rpm,dumping fuel cools cylinder walls.
From what i've heard certain well know vag "tuners" map very lean.