If my exhaust manifold only has one o2 sensor but my wiring for the mpfi tells me to wire a second 02 sensor up. can i get away with not wiring the o2 sensor to the ecu in the first place? or can i solder it to the other o2 sensor(single sensor with 2 wires on exhaust manifold) since my manifold only has one sensor and not two.
what kind of problems would that lead to?

 

i wonder this question as well!!!