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After Glow

WARNING: This page is about a different car, the 2008 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

Once the engine has started, the ECM determines the after glow time depending on cooling temperature. During this time the glow plugs continue to be actuated by the glow plug output stage. This results in improved smooth running after a cold start and improved warming up properties, elimination of blue exhaust after a cold start up and a more stable cold starting speed.

If no signal is received from the coolant temperature sensor the signal from the oil sensor is used as a substitute.

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