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• 20:34, 6 July 2026 Cliff talk contribs created page CALPAK (Created page with "'''CALPAK''' refers to a calibration package used in the Pontiac Fiero ECM. The CALPAK provides backup calibration information used by the ECM. It is related to, but separate from, the PROM. == Overview == The Fiero ECM uses calibration information to control engine operation. The PROM contains the main calibration data, while the CALPAK provides backup or supporting calibration information used by the ECM. A faulty, incorrect, poorly seated, or damag...")