question about stft

my car is a 2014 chevy ss (holden) ls3 with 2 in headers btr stage 2 and a roto fab. exhaust is catless ive been in open loop for the last 2 years but i recently put the o2 sensors back in and put into closed loop just to see how far off i am and although my bank 1 is pretty close my bank 2 stays about 5 percent richer than bank 1. is this normal?

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Originally Posted by biholliday

my car is a 2014 chevy ss (holden) ls3 with 2 in headers btr stage 2 and a roto fab. exhaust is catless ive been in open loop for the last 2 years but i recently put the o2 sensors back in and put into closed loop just to see how far off i am and although my bank 1 is pretty close my bank 2 stays about 5 percent richer than bank 1. is this normal?

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I too have a '14 Chevy SS (Holden). Passenger side (B2) is always about 5% richer. It has done this with different sets of heads, intake manifolds, fuel injectors, replaced O2 sensors/swapped them side to side, and plugs/wires. No idea why. Maybe its a Holden thing lol?

i will leave it alone then. thank you sir.