10a. Electric Fuel Pump Pressure: Purpose:
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The purpose of this test is to verify the fuel system pressure.
Electric Fuel Pump Pressure
- Measure the fuel system pressure at the engine filter housing test port.
- Road test the vehicle with the engine at full load condition from 0-50 MPH.
| Instrument | Specification | Measurement |
|---|---|---|
| 0-1.1 MPa (0-160 psi) gauge | 310-400 kPa (45-58 psi) minimum |
If pressure fails low, go to step 10b.
If fuel pressure is above specification, check fuel return lines for restriction.
If no restriction is present, install a new fuel pressure regulator valve.