This Stage 1 calibration for the 2010 Ford Fiesta 1.4 TDCi breathing new life into its turbo-diesel engine by delivering a comprehensive remap that enhances performance without compromising the car’s renowned drivability or reliability. Starting with a revised turbo boost strategy, pressure ramps are reshaped to minimize lag and provide a seamless, linear torque delivery from as low as 1,500 RPM, ensuring effortless acceleration through city streets and quicker spool-up on open roads. Injection timing and quantity maps have been meticulously optimized to improve atomization and combustion efficiency, resulting in smoother mid-range power and a reduction in the typical diesel clatter under partial load. Load-based smoke and torque limiters are raised within safe margins to unlock an additional 20–25 Nm of torque, enhancing overtaking performance and reducing the need for downshifts. The calibration also includes recalibrated EGR flow and DPF regeneration parameters to limit soot buildup and extend service intervals while preserving emissions compliance under normal operating conditions. Further refinements to gearbox adaptation tables for the 5-speed manual transmission ensure crisp, precise shifts and eliminate hesitation during gear changes, even under the increased load of spirited driving. Comfort features such as idle stability and cold-start enrichment maps remain fine-tuned to retain smooth startup behavior and prevent stall risks in urban traffic. Overall, this map provides a balanced, engaging driving experience—paired with factory safety maps and full checksum correction for seamless flashing via CMD Flash or any EDC17_C10-capable bench or OBD tool.