Fuel Pressure Regulator
WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Install fuel pressure gauge in fuel supply line. Reconnect negative battery cable.
- Start and operate engine at idle. Ensure vacuum is available to pressure regulator. Observe fuel pressure with vacuum hose connected and disconnected at fuel pressure regulator. See REGULATED FUEL PRESSURE table. If fuel pressure is not as specified, check fuel pressure regulator hold pressure. See FUEL PRESSURE REGULATOR HOLD PRESSURE heading below.
REGULATED FUEL PRESSURE
| Model | @ Idle W/Vacuum psi (kg/cm2 ) | @ Idle W/O Vacuum psi (kg/cm2 ) |
|---|---|---|
| Millenia 2.3L | 30-41 (2.1-2.9) | 38-48 (2.7-3.4) |