Do I really need the factory 02 sensor, then the 02 sensor for the DFI, then the 02 sensor after the cat? can't I eliminate the factory pre-cat one and tap into the bosch one that came w/ the DFI? Reason being, I havent tested yet, but I know atleast one of my 02 sensors is bad cause my A/F is always showing lean now even though its backfiring like a machine gun... I'm gonna replace em but dont feel like spending 120 x 3, that sucks.
So I need to run high octane fuel for high boost, high octane fuel is leaded, causing 02 sensor failure over time, just as running rich, using fuel additives, etc...? That sucks.
