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Home >> Ford >> 1989 >> Bronco 4.9 Y, Standard, M5OD-R2 >> Repair and Diagnosis >> Engine Performance >> System >> Emission Control System Description >> Description >> Air Injection System >> Thermactor II/Pulse Air
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Thermactor II/Pulse Air

The Pulse Air or Thermactor II system does not use an air pump. Instead the natural exhaust pulses in the exhaust system are used to pull clean air into the exhaust manifold and/or catalyst through pulse air valves.