Question about 1990 Mitsubishi Minivan
Consequences are poorer fuel mileage and possible Check Engine Light.
I'd start by replacing the thermostat, and flushing the coolant system.
What's probably happening is the thermostat is stuck open, allowing coolant to freely flow through the engine. This lowers the internal temperatures and keeps the combustion process from fully completing (causing worse gas mileage). Start with that and see how it does.
Posted on Apr 14, 2009
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Posted on Jan 02, 2017
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