i just swapped a 98' spec jdm itr into my 91' civic hatch & i have a couple questions.

i know we both had the same 240cc injectors, so is my factory fuel pump sufficient? or would a walbro 190lph be better?

i converted to ob1 and am using a chipped P08 running a replicated copy of the factory map. my friend said he chipped it for a one wire o2, but when i decelerate in gear for a couple seconds, or let off the throttle on the freeway ill throw a cel for my o2. im guessing the ecu needs 4 wire o2 still and because its not heated and the temperature changes too much when i decelerate in gear throwing the code.

thanks.

 

the old school one wire o2 sensor sucks. That is why Honda upgraded to the heater sensor which gives much better readings and a better running setup

you do not need to upgrade your fuel pump for a stock itr engine

 

okay so i run one black heater wire to the primary o2 on the ecu, the signal to the signal, other block is switch 12v & white is ground right?

okay cool, well i think i should atleast get a fuel pressure gauge & see if my pump can throw the factory itr fuel pressure.