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Home >> Pontiac >> 1984 >> T1000 L4-98 1.6L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Modes of Operation >> Altitude Compensation
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Altitude Compensation


On "Minimum Function Systems" grounding ECM terminal 18 compensates for high altitude operation.