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Home >> Pontiac >> 2003 >> Vibe Base, AWD >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Control System - Theory & Operation >> Fuel Systems >> Fuel Control >> Engine Starting Enrichment
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Engine Starting Enrichment

In order to improve starting performance, fuel enrichment during start-up is carried out. For a certain time after the engine is started, the air/fuel mixture is enriched slightly in order to stabilize the engine speed. The amount of compensation varies depending on the engine coolant temperature as measured by the ECT sensor.