How do you stop your Renault Megane S Reg Hatch engine overfuelling when starting some times?

To address engine overfuelling in your Renault Megane S Reg Hatch, first check the fuel injectors for clogs or leaks, as they may be delivering too much fuel. Inspect the engine's temperature sensors and mass airflow sensor, as faulty readings can cause incorrect fuel mixture. Additionally, ensure that the fuel pressure regulator is functioning properly. If the issue persists, consider consulting a mechanic for a thorough diagnostic.