Grand Marquis V8-4.6L Flex Fuel (2010)
Engine Oil Pressure: Testing and Inspection
Engine
Component Tests
The following component tests are used to diagnose engine concerns.
Oil Pressure Test
1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in
Vehicle Jacking and Lifting. Failure to follow the instructions may result in serious personal injury.
Disconnect and remove the EOP switch from the engine.
2. Connect the Engine Oil Pressure Gauge to the EOP switch oil galley port.
3. Run the engine until normal operating temperature is reached.
4. Run the engine at the specified rpm and record the gauge reading.
5. The oil pressure should be within specifications; for additional information, refer to the specification chart in the appropriate engine system.
6. If the pressure is not within specification, check the following possible sources:
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Insufficient oil
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Oil leakage
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Worn or damaged oil pump
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Oil pump screen cover and tube
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Excessive main bearing clearance
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Excessive connecting rod bearing clearance
7. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and
procedures, refer to Vehicle Jacking and Lifting. Failure to follow these instructions may result in serious personal injury.
If equipped with a fire suppression system, repower the system.
