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Low oil pressure - 2003 Ford Expedition

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Re: Low oil pressure

Really only two possibilities if the vehicle is otherwise running properly. Either your oil pump is bad (likely a job for your favorite mechanic) or the oil pressure sending unit is failing (a simple replacement job). I suggest that you replace the sending unit and see if that cures the low pressure reading. You can pick up a new sending unit at just about any parts outlet, and they will likely have a diagram or photo showing the position of the unit in your vehicle.

Bill B

Posted on Oct 01, 2010

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Re: Low oil pressure

When was the last time that you had Your Oil & Filter Changed ?
This would be my first step. BUT! It wouldn't hurt to take a sheet of cardboard or carpet Toss it on the ground and CHECK FOR OIL LEAKS .

Hope this helps: Please let me know how you make out

Posted on Oct 01, 2010

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10.The gallery plugs are missing or improperly installed -- install or repair as necessary.

11.The pressure regulator valve is stuck.Check the pressure regulator valve for sticking in the bore.Check the bore for scoring and burrs.
12.The camshaft is worn or poorly machined -- replace the camshaft.

13.Worn valve guides -- repair as needed.


If the vehicle has low oil pressure perform the following tests.
Check the oil level.
Raise the vehicle and remove the oil filter.


Start the engine and check the overall oil pressure, the oil pressure switch, and for noisy lifters.
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If adequate oil pressure is indicated, check the oil pressure switch.

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Without the tools to test the pressure, about all I might suggest is trying another oil filter brand, to see if you can get more pressure. It sounds like the sensor is working properly.Please let me know what you find out. Keep me posted and be glad to help you get your Montana running 100%. please rate. Oil pressure test kit J 25078-c is needed to test the oil pressure and can be loaned out in most auto parts store like Auto Zone or Parts Source.






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