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Home >> Mercury >> 1988 >> Tracer 4D Wagon, Standard >> Repair and Diagnosis >> Engine Performance >> System >> MPFI System >> Operation >> Outputs >> Ignition Module
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Ignition Module

The ECA modifies ignition timing when the vehicle is operated at high altitudes. Based on input from the BARO sensor, at altitudes of 3280 feet or higher, the ECA will signal the ignition module to advance ignition timing.