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Home >> Mazda >> 1979 >> B2000 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emissions System - Thermostatic Air Cleaners >> Testing >> 1976-77 Models

1976-77 Models

Check all valves and linkage for sticking or wear. Check the thermostat spring, if equipped, to ensure it has tension. Warm engine, then remove the hot air hose. Check to make sure that the air valve closes the fresh air passage and the hot air side is open.

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