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Escort 3 (1980-1985) Escort 4 (1986-1990) Escort 5 (1990-1997)

Lubrication system malfunctions (Escort 4)

CAUSE	METHOD OF ELIMINATION
After turning on the ignition, the oil pressure indicator light does not light
The oil pressure sensor is faulty	To check the sensor, turn on the ignition, remove the wire from the sensor and short it to ground. If the indicator light comes on, replace the oil pressure sensor
Broken wire to oil pressure sensor, oxidation of contacts	It is eliminated by checking the serviceability of the wires and cleaning the contacts
Light bulb failure	It can be fixed by replacing the light bulb
Oil pressure warning light does not go out when engine speed increases
High oil temperature	When the engine speed increases, the indicator light should go out
After starting the engine, the oil pressure warning light does not go out
The oil pressure sensor is faulty	It is eliminated by checking and replacing the oil pressure sensor
Low oil pressure, which can occur due to low oil level in the crankcase	Add oil to the crankcase
The wire connecting the oil pressure sensor and the warning light is shorted to ground	To check, turn on the ignition and remove the wire from the oil pressure sensor; if the light goes out, find the place where the wire is shorted to ground and insulate it
Low oil pressure throughout the entire engine speed range
Low oil level in crankcase	It is eliminated by adding oil to the normal level
The oil receiver mesh is clogged	Eliminated by cleaning the mesh and oil intake pipe
The oil intake pipe is poorly secured	Secure the oil pickup pipe
Wear of oil pump parts	Remove the oil pump and check its condition
Increased clearance in the crankshaft main bearings	In this case, disassemble and repair the engine
Low oil pressure at engine idle
The pressure reducing valve is stuck in the open position	Remove the valve, clean it and check its operation
Increased oil pressure at engine speeds over 2000 rpm
The pressure reducing valve does not open	Remove the valve, clean it and check its operation

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Article reviewed: Herman Ostrovsky

« Previous articles
Engine crankcase ventilation system
Replacing the oil filter
Engine oil change
Removing and installing the oil pump
Removing and installing the oil pan

Next articles »
Exhaust system — design description
Removal and installation of the exhaust system
Replacing the rear muffler
Vehicles with a catalytic converter — general information

See other similar articles for Ford cars:
• Possible malfunctions of the cooling system, their causes and methods… Ford Focus 2 (2004-2010)
• Lubrication system malfunctions Ford Mondeo 3 (2000-2007)
• Possible malfunctions of the lubrication system, their causes and… Ford Fiesta 4 (1996-1999)
• Fuel system diagnostics Ford Taurus 1 and 2 (1986-1994)
• Malfunctions in the starting system Ford Fusion (2002-2012)
• Fuel system (diesel) Ford Transit 2 (1986-2000, diesel)

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