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Home >> Mitsubishi >> 1991 >> Montero Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> Engine Coolant Temperature Sensor >> Trouble Shooting Hints
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Trouble Shooting Hints

If, during engine warm-up, the fast idling speed is not correct, or black smoke is emitted, the problem is usually a malfunction of the engine coolant temperature sensor.