Operation CHARM
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Lincoln
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2005
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LS V8-3.9L VIN A
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Description and Operation
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CMP FMEM
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.