I'm getting a CEL code 43 on my civic. Stock: engine, exhaust, headers. Modded: fuel pump, intake, ignition, throttle, etc. (read my sig).
I get this code after driving about 20 mins/ mi and when I'm at a light waiting to turn green sometimes. Fumes from the engine stink a bit.
Code 43 - Fuel supply, but want to get some input.