Digifant (Vanagon)
- Remove fuel pump relay. Start engine. Operate engine until it stalls. Crank engine to ensure all fuel pressure is relieved. Install Fuel Pressure Gauge (VW 1318) at fuel supply hose 3-way "T" connector. See Fig 1
. Turn ignition on. Ensure there are no fuel leaks.
- Start engine. With engine idling, minimum pressure should be 29 psi (2 kg/cm2
). Remove vacuum hose from fuel pressure regulator. Fuel pressure should increase to 36 psi (2.5 kg/cm2
).
- Turn engine off. After 10 minutes, residual pressure should be 29-36 psi (2-2.5 kg/cm2
). If fuel pressure is incorrect, check for restricted fuel lines, defective fuel pump, or weak control pressure regulator. If these items are okay, go to MAIN FUEL PUMP VOLUME CHECK.
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