Excel L4-1468cc 1.5L SOHC (8 VALVE) (1986)
Fuel Pressure: Testing and Inspection
Fuel Pump Location
INSPECTION:
1.
Checking Leakage: If there is oil or fuel leaks from breather hole, oil seal or diaphragm the of the fuel pump, the pump is defective. Replace fuel
pump as an assembly.
2.
Inlet Valve Test; To test the inlet valve, connect a vacuum gauge on the inlet fitting while the line is disconnected. Start or turn over the engine
with the starter motor. There should be a noticeable vacuum present. If blow back is present, the inlet valve is not seating properly.
3.
If the fuel pump does not perform to above test requirements, a new fuel pump should be installed.
PRESSURE TEST:
1.
Disconnect the hose at the carburetor and connect a fuel pressure gauge.
Fuel Pump Pressure Test
2.
Disconnect the fuel return hose from the pump and plug the fuel pump return pipe as shown in illustration.
3.
Check pressure while the engine is idling.
4.
Replace the pump, if required.
Pressure @ 1,250 RPM: 2.76 - 3.63 psi (0.19-0.26 kg/cm.sq.)
FUEL FLOW RATE TEST (Volume):