H1 V8-6.5L DSL Turbo (1999)
Fuel Boost Pump / Fuel Transfer Pump: Testing and Inspection
Fuel Pump Pressure Test
Fuel pump pressure should be 5.8-8.7 psi (40-60 kPa) at idle.
1. Disconnect fuel line at fuel filter inlet port.
2. Install a tee adapter in fuel line between pump and filter inlet port.
3. Connect test gauge to tee adapter. Gauge should have pressure capacity up to 20 psi (138 kPa).
4. Start and run engine and record fuel pump pressure.
5. If pump pressure is less than 5.8 psi (40 kPa), replace pump and retest pressure.
6. Remove pressure gauge and tee adapter. Reconnect fuel line to filter inlet.
