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6 July 2026

  • curprev 20:3420:34, 6 July 2026 Cliff talk contribs 4,617 bytes +4,617 Created page with "'''PROM''' refers to the removable calibration chip used in the Pontiac Fiero ECM. PROM stands for '''Programmable Read-Only Memory'''. In the Fiero ECM, the PROM contains calibration information used by the ECM to control the engine. == Overview == The PROM contains engine and vehicle-specific calibration data. This information tells the ECM how to manage fuel delivery, ignition timing, idle behavior, emissions functions, diagnostic behavior, and other engine..."
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