7.2 Cold Start and Cold Running Enrichment
To ensure good starting and smooth running, the Digifant II system provides extra fuel to a cold engine. The coolant temperature sensor gives the control unit information on engine temperature. The control unit, in turn, makes an adjustment to injector opening time to provide the necessary richer mixture. For additional cold running driveability and fuel economy, the intake air preheat system warms the air entering the engine.
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