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Home >> Saturn >> 2005 >> Vue Red Line, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.5L (L66) Introduction >> Description and Operation >> Fuel System Description >> Engine Warm-Up Enrichment

Engine Warm-Up Enrichment

When the engine is cold, additional fuel is added in order to ensure good driveability. The level of initial enrichment is determined by the engine coolant temperature (ECT) sensor and intake air temperature (IAT) sensor input. The air/fuel mixture enrichment is gradually decreased until the ECT sensor reaches a specified value.

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