Engineers built this file around Stage 1 objectives, widening the 1.6 HDI’s torque window while preserving factory refinement. EGR flow and its diagnostics are fully disabled, keeping the intake charge clean. Torque, boost and smoke limiters are rescaled with balanced air-fuel targets so the six-speed gearbox stays within OEM load margins. Cold-start, idle and part-throttle cells are retuned to protect stock fuel economy on cruise yet deliver a crisper pedal in city traffic.