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Home >> Audi >> 1991 >> 100 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System (2.3L) >> Fuel Pressure (2.3L) >> System Pressure (2.3L)

System Pressure (2.3L)

  1. Remove fuel line from cold start valve. Remove test plug from distributor lower chamber. Connect Pressure Gauge (VW 1318) between fuel line from cold start valve to lower chamber. See Fig 1 .
  2. Disconnect differential pressure regulator connector from side of regulator. Remove fuel pump relay. Jump connector in fuel pump relay socket. Open valve on pressure gauge.
  3. Energize fuel pump. Note pressure reading on pressure gauge. Pressure should be 88-94 psi (6.2-6.6 kg/cm2 ). System pressure is not adjustable.
Fig 1: Checking Fuel Injection System Pressure
G61289Courtesy of AUDI OF AMERICA, INC.
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