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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Air Injection Systems >> Pulse Air Valve System

Pulse Air Valve System

The pulse air valve replaces air pump on some thermactor systems. The pulse air valve uses natural pulses present in exhaust system to pull air into exhaust manifold. The pulse air valve is connected to exhaust manifold by a tube, and to air cleaner by a hose. This allows fresh air to complete oxidation of exhaust gases and blocks backflow of high pressure exhaust pulses.