Question about 2001 Ford Expedition

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Oil pressure goes up for awhile and down for awhile.

My 2001 ford expedition, when you cold start it the oil pressure goes up like it is suppose to but when it gets arm I loose all oil pressure and it just goes up and down until it has no pressure. I talked with the dealer and they are telling me that the pvc valve malfuntioned and pumped all the oil out of my car. It has never smoked or used any oil, is this possible?

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  • jdbottoms Jul 02, 2009

    Do you want the complete story or the short one?

  • jdbottoms Jul 02, 2009

    after riding down the highway at 75 mph I found that I had no oil pressure what so ever. So I pulled over and checked my oil, had some in there but not much. Purchased 3 quarts for starters and put that in. Oil pressure restored i thought, drove maybe 20 feet lost oil pressure again, and again put in 3 more quarts. Oil pressure restored for a little while. Got the car home and called the ford dealer. I thought it may be the oil pump. Went out to start it and the oil prssure rose to its normal level and then drop as soon as the car got warm, then it goes up and down for a few minutes until the pressure never comes back up. According to the ford place the pvc valve malfunctioned and pumped the oil out of the car. This car has never smoked or used oil and has over 129,000 miles on it. Is this possible? I am find that alot of poeple here in NC are having this problem. Now I need to replace the motor, if they are right. If they are wrong how can it be sure?

  • yadayada
    yadayada May 11, 2010

    yes it is possible.



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I've not heard that a malfunctioning pvc valve could allow most ALL of your oil to leave the engine. The PVC replacement is a regular maintenance item over the lifetime of the vehicle. It is important to check your oil level regularly, like at every gas fillup. Could it be possible the engine was already very low on oil?

Obviously you should change out the pvc valve immediately, change the oil and filter in the vehicle and check the drained oil for metal scrapings and other signs of damage.

My final suggestion is that you have a trusted mechanic check it out.

Posted on Jul 02, 2009


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Valves clattering on 2001 ford expedition 4.6 liter

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Make sure you are using a genuine Ford oil filter. The Ford filter has pressure valves in it to keep the oil where it belongs. Make sure you are using the proper weight of oil.

If the oil and filter are proper, it sounds like the oil pump pickup is clogged or there is excessive play in the crank bearings. The engine is running dry on oil because it is not pumping up until the oil is circulating completely through the engine.

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