exhaust manifold oxygen sensors

[evans 86prelude]

i have a question about my oxygen sensors locations
i have a 89 accord exi with the a20a3 and plan to put it in my 86 honda prelude si i plan to keep the accord 4-2-1 mani and intake to have 120 instead of 110 that the bt had.
my prelude manifold had only one oxygen sensor and the accord has 2 would i connect only one and leave the other out, or connected both into one wire into the prelude? thanks

[AccordEpicenter]

ok just connect the white connector, leave the green hang free. THe green one is a narrowband o2 sensor, the white connector is for the wideband o2 sensor, thats the one you want.

[shepherd79]

Get ready for hole lot of pain. 88-89 A20A3 motors had diff wirring. you will have to get ECU and blcak box from 88-89 accord. plus you will have to figure out how to extend or replace some electrical.
it will be a hole lot of problems. good luck.

[AccordEpicenter]

if i were you id just ghetto rig an 86-87 wiring harness, the only thing that youll have to really worry about is the idle without the eacv and triggering the pretec solenoid (air door in the intake mani) use an 86-87 computer. TONS OF WORK for 10hp imo

[evans 86prelude]

well the accord runs with my 86 prelude si ecu but if its going to be a real pain i can use my 86 exhaust manifold but what about the intake i know i have to block off the EGR because the lude never had it or should i use the same intake off the prelude, i changing the motor in the lude because i spun a rod bearing and messed up the crank