C 3500 1 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1982)
Fuel Pressure: Testing and Inspection
Fuel Pump Pressure Test - Mechanical Fuel Pump
Fuel Pump Pressure Test
1. Disconnect fuel line at pump and connect a suitable pressure gage.
2. Start engine and check pressure with engine running at slow idle speed. Fuel pump pressure should be as specified. On vehicles equipped with a
vapor return system squeeze off the return hose so that an accurate reading can be obtained.
3. If fuel pump pressure is below minimum, pump must be replaced.
