so i blocked that "intake" i mentioned, it did bugger all to the lambda readings

took it for an "italian tune", did bugger all for the lambda readings

whilst driving i noticed:

under heavy/full load sensor 1 was 0.8 - 0.9v and sensor 2 was 0.025 - 0.035v

on overrun both sensors showed 0.00v

cruising along sensor 1 0.8v sensor 2 0.7 - 0.8v

on idle they show the same as cruising