My first scan is very disappointing.C6 6Speed. 2 questions about it .
I captured an OL Drive 1st gear 48%TP showing 50,75:1 for AFR at 0,872
and 0.885 Volts.spark 28.5 KR is only 0.6. How can this be … no knocking this lean.
This around 50 value appears also with lover rpm during acceIleration.
I installed a catback before I had the Scan tool.
So i rely on novice guessing. Is this possible by less backpressure only ?.
Second finding, bank 1 and 2 long term fuel trims are simular distributed
over almost all cells, but 5% apart . Looks like a different head.
The ltft #s tend to be positive, the car runs lean, okay…. But it is very fast, maybe
It could be fast already driving 200 Km/h an then accellerating.
Any ideas …
Greetings from Wiesbaden