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1992 Mitsubishi Diamante Question: engine revving up



, 3.0L V6 SOHC, White Bluff, TN, January 12, 2010, 10:58

checked vacuum lines,they seem ok. check engine lite is not on,but the coolant lite is. coolant is full in radiator and the reservoir. started black smoking, bad egr maybe?

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  • Answer #1

    January 12, 2010, 18:46

    Black smoke is from too much fuel, not EGR. You may have excessive fuel pressure, bad mass airflow meter or a bad injector. Even though the check engine light isn't on, check the codes, there may be one stored.

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