Q45 V8-4.5L (VK45DE) (2002)
Fuel Pressure: Testing and Inspection
FUEL PRESSURE CHECK
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When reconnecting fuel line, always use new clamps.
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Make sure that clamp screw does not contact adjacent parts.
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Use a torque driver to tighten clamps.
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Use Pressure Gauge to check fuel pressure.
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Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate false readings.
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Do not use the fuel hose for checking fuel pressure more than 30 times.
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Do not use the fuel hose for checking fuel pressure with damage or cracks on it.
1. Prepare a fuel hose for checking fuel pressure (Part No. 16511 6N210).
2. Cut this fuel hose at the middle and connect a fuel pressure gauge.
3. Release fuel pressure to zero.
4. Disconnect fuel hose between fuel pressure regulator and fuel tube to fuel tank.
5. Install the pressure gauge between fuel pressure regulator and fuel tube to the fuel tank as shown in the figure.
6. Start engine and check for fuel leakage.
7. Read the indication of fuel pressure gauge.
At idling:
With vacuum hose connected Approximately 235 kPa(2.4 kg/sq.cm, 34 psi)
With vacuum hose disconnected Approximately 294 kPa (3.0 kg/sq.cm, 43 psi)
If results are unsatisfactory, perform Fuel Pressure Regulator Check.