Operation CHARM
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Mercury
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1993
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Grand Marquis V8-281 4.6L SOHC
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Pinpoint Tests
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G - In-Range MAF/TPS/Fuel Injector Pulse Width Test
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G4 - Check MAP/BARO Sensor Output
G4 - Check MAP/BARO Sensor Output
Pinpoint Test G4:
