Fuel Pump Maximum Pressure
- Disconnect negative battery cable. Disconnect fuel inlet hose at fuel rail. Install fuel pressure gauge to fuel inlet hose and plug fuel pressure gauge outlet hose. Reconnect negative battery cable.
- Locate data link connector in left side of engine compartment. Connect a jumper wire between data link connector terminals F/P and GND. See Figure . Turn ignition on for 10 seconds to operate fuel pump and observe fuel pressure. See FUEL PUMP MAXIMUM PRESSURE table. Turn ignition off and disconnect jumper wire. If fuel pressure is not as specified, replace fuel pump.
FUEL PUMP MAXIMUM PRESSURE
| Application | Pressure psi (kg/cm2 ) |
|---|---|
| Miata | 92 (6.5) |
| Millenia | 71-92 (5.0-6.5) |
| MPV | 85-110 (6.0-8.0) |
| 626 | 71-92 (5.0-6.5) |
| Protege | 64-92 (4.5-6.5) |