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Q:

engine revving up on 1992 Mitsubishi Diamante

Enthusiast 01be16a5a93688912f14755221fb15211b518d9a788cf01b455e03cc1bd585ac
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?
(1) Answer
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.