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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1 Answer

Valves clattering on 2001 ford expedition 4.6 liter


Drive it as is, or put a couple thousand into the fix

You ran it out of oil,find out why

The damage is done to any number of places in the motor,
your lucky you can still use it

Don't spend money on a 13 year old vehicle & a 4.6
Drive it as long as you can,find out where the oil went

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You probably do not have a working water sensor or the Brain is not making the adjustments. You would need to test the latter, but the water sensor is inexpensive to do trial and error. Just change the correct one.

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