I couldn't find any other posts on a CEL Code 43, unless I wasn't looking in the right spot. I keep getting a CEL once the car is warmed up--Code 43. I have a B20 in my EF. Fuel pump was replaced with swap (LS or CRV pump I believe). Weird thing is, once the CEL comes on, the car seems to run BETTER... More often than not, if I am not getting on it, it will pop the CEL. Hard acceleration seems to keep it off for the most part. Should I be worried about this? Time for a new pump? Honda won't look at it and nobody else seems to know. Everyone seems to say, "Just replace the pump." If that is the case, which pump to go with becomes the question. I would replace it with the Walbro 255, but if it's nothing that drastic, then I would prefer not to. Taking the tank down to change it the first time was enough of a pain... Thanks in advance.