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Home >> Audi >> 1991 >> 100 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel Control (2.3L) >> Residual Pressure
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Residual Pressure

  1. Connect Pressure Gauge (VW 1318) as described previously in SYSTEM PRESSURE. See Figure . Open pressure gauge valve.
  2. Operate fuel pump for at least 30 seconds. Shut off fuel pump. Note system pressure. Pressure should be 51 psi (3.6 kg/cm2 ) after 10 minutes and 49 psi (3.4 kg/cm2 ) after 20 minutes.
NOTE: RESIDUAL PRESSURE test DOES NOT include cold start valve testing. To check cold start valve, attach fuel line. Operate fuel pump and visually check for leaks.
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