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Home >> Mercury >> 2008 >> Sable Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Description And Operation (Except Diesel & Hybrid) >> Ignition Systems >> CMP FMEM

CMP FMEM

During CMP FMEM the COP ignition works the same as during engine crank. This allows the engine to operate without the PCM knowing if cylinder one is under compression or exhaust.