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2006 Ford Expedition Question: Low oil pressure came on yesterday. knocking noise. Sometimes it goes off.

 

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Fordexpi, Sugar Land, TX, October 14, 2013, 10:50
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The camshaft sensor, crankshaft sensor and 4 coil-packs were replaced on Saturday. Truck was running smooth for about 2 miles. Check engine light came on and the low oil pressure warning came on. Put some oil in(about 2 quarts) and it went off, then it started again about a mile later.

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  • Answer #1

    G. T. Service Center (4075 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG October 14, 2013, 12:28
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    What kind or brand of oil are you using. Were you low when adding 2qts?

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    Fordexpi, October 14, 2013, 12:57
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    I used motor-craft synthetic blend. I only added 2 qts because I had more at home and it was reading low pressure. It was a little low I guess. I haven't added more yet because someone mentioned that it may be the oil pump. But it may also be something with the switching out of the sensors on the camshaft and crank-shift.

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    ProfessorG, October 14, 2013, 13:00
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    Don't overfill your oil. Check the connection to the oil sending unit. If it's not knocking when low pressure indicated, I would replace the oil sending unit. Many times they go bad, and your oil pressure is fine. ALWAYS CHECK OIL LEVEL BEFORE ADDING.

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    Fordexpi, October 14, 2013, 13:14
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    Thanks, did check oil and oil level is fine, however the oil pressure gauge is on low.

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    ProfessorG, October 14, 2013, 13:38
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    Check connection and/or replace the sender, it's usually behind the oil filter. Make sure it's not leaking as well since you were also low on oil.

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    Fordexpi, October 14, 2013, 14:14
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    Thanks,

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  • Medium-star Best Answer
    pushrod October 14, 2013, 14:50
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    Have the oil pressure checked with a manual test gauge!

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