hey guys i found a solution to the common problem (code 91) that 96-98 civics face with a obd2b swap. i bought a 99-00 civic si fuel pump and installed it this morning...and the check engine light has not come on all day. i suggest you give it a try...ill let you guys know tommorow how it goes to see if its a deffinate solution.
Robbo

 

UPDATE: this is not a solution the damn check engine light came back on after 2 and a half days of driving...im so pissed i though i fixed it. sorry guys. anyone else have any ideas how to fix this problem?

 

what swap do u have? all i did was change my ecu for my b18c1 swap in my 96 hatch...but anyways heres a link that helped me....

https://honda-tech.com/zerothread?id=767817