2.8L VR6 (Engine Code AXK)
- Ensure ignition is off. Ensure battery voltage is at least 12 volts. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE (2.8L VR6, ENGINE CODE AXK) . Remove fuel filler cap.
- Connect Pressure Gauge (VAG 1318), or equivalent, at fuel supply line/hose in engine compartment. See Fig 1 . Open shut-off valve of fuel pressure gauge; lever points in the direction of flow (A). Reinstall fuel pump fuse No. 18 (if removed).
- Remove fuel pump relay from relay panel. Connect Remote Control Switch (VAG 1348) between battery positive source and fuel pump terminal. See Figure .
- Activate fuel pump with remoter control switch and slowly close lever (A) until pressure is at 44 psi (3 bar). See Figure . Once this pressure is reached, do NOT move lever any further. Empty measuring container.
- Connect DVOM to battery terminals. Activate fuel pump for 30 seconds while collecting fuel in measuring container and measure battery voltage. Record fuel volume and battery voltage.
- Compare quantity of fuel with specification. See Fig 2
.NOTE: Voltage shown in graph in Fig 2 is at fuel pump. Battery volage is about 2 volts more than that measured directly at fuel pump.
- If minimum fuel pump volume is not as specified, check fuel lines for possible restrictions, kinks or blockages. Connect Pressure Gauge (VAG 1318), or equivalent, at fuel filter. See Figure .
- Repeat fuel pump volume check. If minimum volume is now reached, replace fuel filter.
- Repeat fuel pump volume check. If minimum volume is still not reached, remove fuel pump and check strainer for clogging. If strainer is okay, replace fuel pump.NOTE: It is not necessary to drop fuel tank to access fuel pump. Remove driver's seat. Lift carpeting above parking brake lever. Remove fuel pump assembly access plate. See Figure .
- If fuel pump volume is okay, but an intermittent fuel supply problem is suspected, check fuel pump amperage draw. See FUEL PUMP AMPERAGE DRAW .
NOTE:
Fuel filter is mounted near fuel tank.