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Air Pump

Air pump is belt driven on all models except Impulse. It draws fresh air in, pressurizes it and passes it to the rest of the system. A built-in relief valve will bleed off any excess pressure occurring in the air pump. Normal pump pressure is 2.8-5.0 psi (.2-.4 kg/cm² ).

Fig 1: Air Injection System (Impulse)

Courtesy of ISUZU MOTOR CO.