here's the deal, i swap in a b18a in my 89 civic and when i start it there's no code. but when it get's hot it gives me a code 43 which is fuel delivery system. i already change the fuel pump (walbro255), and i also change the fuel filter..but im still getting the same code..can you guys please help me!!!!! Thanks.......

 

maby its getting low fuel press becuse the fuel regulator is not working right. Just a thought...

 

thanks im gonna give it a try....