Fuel Pressure Hold
- Disconnect negative battery cable. Install fuel pressure gauge in fuel supply line. 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 Fig 1. Turn ignition on for 10 seconds to operate fuel pump. Turn ignition off and disconnect jumper wire. Wait 5 minutes and observe fuel pressure. Fuel pressure should be at least 21 psi (1.5 kg/cm2
).
- If fuel pressure is not as specified, check fuel pump hold pressure and fuel pressure regulator hold pressure. See FUEL PUMP HOLD PRESSURE and FUEL PRESSURE REGULATOR HOLD PRESSURE
. Also check for injector fuel leakage. See INJECTOR FUEL LEAKAGE .
Courtesy of MAZDA MOTORS CORP.