car is a 89 civic std, with a 93 d16z6 motor and obd0->obd1 harness using a p28 ecu.

today the check engine lite popped up and i checked it and got a code 43, which is for fuel supply system. what do i do to repair this? i'm going to start by changing the fuel filter. do you guys think i should change the fuel pump also? never got this code before, so i'm not sure how to go about attacking it

 

That code has to do with the heated 02 sensor. Swap out your o2 and Im sure that will fix it. HTH

 

i have one laying around from a b18c motor, would that work?