Oil Pressure Test
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect and remove the oil pressure sensor from the engine.
- Connect the Oil Pressure Gauge to the oil pressure sender oil galley port.
- Run the engine until normal operating temperature is reached.
- Run the engine at the specified rpm and record the gauge reading.
- The oil pressure should be within specifications; refer to ENGINE - 3.9L & 4.2L .
- If the pressure is not within specification, check the following possible sources:
- insufficient oil
- oil leakage
- worn or damaged oil pump
- oil pump screen cover and tube
- excessive main bearing clearance
- excessive connecting rod bearing clearance