Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Fuel Pressure: Testing and Inspection
Fuel Pump Pressure Test - Mechanical Fuel Pump
FUEL PUMP PRESSURE TEST
1. Disconnect the fuel line at the carburetor.
2. Install a low pressure gage onto the line.
3. Start the engine.
4. Fuel pump pressure should be (4 to 6.5 psi).
5. If pressure is less, check for restrictions in fuel tank sender filter, lines or hoses.
6. Reconnect the fuel line.
