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VANAGON With AFC-DIGIFANT II

  1. Install Fuel Pressure Gauge (VW 1318) at fuel supply hose 3-way "T" connector. See Fig 1 . Using a jumper wire, connect terminals No. 30 and 87 on fuel pump relay.
  2. Turn ignition on. With fuel pump operating, minimum pressure should be 33 psi (2.2 kg/cm2 ). If fuel pressure is incorrect, inspect for restricted fuel lines, defective fuel pump or weak control pressure regulator. If okay, perform MAIN FUEL PUMP VOLUME CHECK.
Fig 1: Testing Fuel Pump Pressure (Vanagon)
G121502Courtesy of VOLKSWAGEN UNITED STATES, INC.
REGULATED FUEL PRESSURE

Application/ Model Engine Off (1) psi (kg/cm2 ) At Idle psi (kg/cm2 )
Cabriolet 29-36 (2.0-2.5) 75-82 (5.2-5.6)
Golf GL/GTI & Jetta 29-36 (2.0-2.5) 75-82 (5.2-5.6)
Corrado 29.0 (2.0) 36 (2.5)
Fox 38.0 (2.6) 75-82 (5.2-5.6)
Jetta GLi 48.0 (3.3) 89-95 (6.1-6.6)
Vanagon 29-36 (2.0-2.5) (2) 33 (2.2)
(1) After checking fuel pressure at idle, turn ignition switch to OFF position.
(2) With pressure regulator vacuum hose disconnected, pressure should be 36 psi (2.5 kg/cm2 ).