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Home >> BMW >> 1979 >> 320i Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Air Injection System >> Testing >> Air Pump

Air Pump

  1. Disconnect air output hose from rear of air pump. Start engine and run at idle. Place hand near output fitting on pump.
  2. Slowly increase engine speed. Air pump output pressure should increase with engine speed. If not check drive belt tension and air pump installation. If these are okay, air pump is defective.
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