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Home >> Audi >> 1990 >> 80 Base, 2.0 A, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure (Cis Digital Control) >> Main Pump Delivery Volume
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Main Pump Delivery Volume

  1. Check transfer pump (if equipped) and fuel filter. Disconnect fuel return line and place open end in measuring container. Switch on fuel pump with jumper switch. Check fuel pump delivery volume for 30-second period.
  2. Minimum delivery volume is .71 qts. (.68L) for 30 seconds with reading of 11.4 volts at fuel pump. Voltage is measured with engine off and fuel pump activated by jumper switch.
Fig 1: Fuel Quantity Analyzer (US 4480)
G90H17316Courtesy of AUDI OF AMERICA, INC.