Question about 1998 Ford Expedition

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Oil pressure problem after 10 - 15 minutes of driving

After driving 10 -15 minutes, the oil pressure taps and then red lines. Vehicle does still drive fine for a while then you start hearing lifter noise. If I cut the verhicle off and then back on, it will resume proper pressure for 10 - 15 more minutes.

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Remove sump and look at oil pump pick up pipe /filter sounds like its full of crud and clogging up ,if it appears ok renew oil pump Five Germans in an Audi Quattro arrive at the Italian border. An Italian police officer stops them and says "Itsa illegala to putta five-a people in a Quattro !"

"Vot do you mean, it's illegal ?" the German drivers asks.

"Quattro means four !" the policeman answers.

"Quattro iz just ze name of ze fokken automobile" the German shouts ... "Look at ze dam paperz: Ze car is dezigned to carry 5 people !"

"You canta pulla thata one on me !" says the Italian policeman. "Quattro meansa four. You havea five-a people ina your car and you are therefor breaking the law !"

The German driver gets mad and shouts "You ideeiot ! Call ze zupervizor over! Schnell! I vant to spik to zum vun viz more intelligence !!!"

"Sorry" the Italian says, "He canta comea. He'sa buzy with a two guys in a Fiat Uno."

Posted on Feb 04, 2009


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By the sound of it you are still driving the vehicle and it hasnt destroyed itself so I would guess that the oil pressure sensor is failing.

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High temp low oil pressure light comes on after driving for a few minutes, then off when engine at driving rpm. At stop light (idle or low rpm) light comes back on. Normal driving it goes out.

You need to find out why you have low oil pressure. It is normal that as engine rpm's increase, the oil pressure will rise- the oil pump is moving oil faster. Even though your light goes out, you could still have critically low oil pressure. There should be sufficient pressure at idle to keep the light off. The light will come on when your oil pressure is almost nil- I believe for some it's as low as 8 psi. Normally, oil pressure at idle is specified anywhere from 15 to 40 psi. You would have to check specifications for your Expedition. To verify oil pressure, hook up a mechanical gauge at the oil pressure sending unit on the engine block. Check with a local shop.

The causes run from easy, simple to budget busting ruin. Low oil level, wrong grade oil, real old oil, oil leaks, internal oil leaks, worn oil pump, worn crankshaft bearings. It was pretty common on older very high mileage cars to have a fluttering oil light at stops and idle. It was time for a rebuild, or time to look for another car.

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My Olds alero 01 2.4 has a metallic tapping noise when in drive, oil pressure light flickers on left turns only, and rpms jump and car bucks at over 65mph. Oil level is fine, just changed it. 72k

The tapping must be a drive train problem, not the engine where it would be tapping all the time. It could be a transmission/transaxle internal problem, or it could be a bad CV joint on the drive shafts. The drive shafts, or half shafts as they are called-one for each side of the car-connect the transaxle to the wheels, and the CV joints on the shafts allow for turning movement and for car suspension movement, while maintaining constant power to the wheels.

As for the oil light and the car bucking, I really would have a shop check the engine's oil pressure to see if it is acceptable. The light only comes on or even flickers at very low oil pressure, and that could be worrisome. It could cause expensive engine repairs. So I suggest you have an oil pressure check along with the tapping in drive, and go from there. They all sound like unrelated events, but you never know.

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This vehicle as well most other Volkswagens of that era are notorious for oil sludge in the engine. Go to any Vw forum and you will see. You have to get this sludge out or otherwise it contaminates fresh oil and makes it lose its viscosity.

As far as the oil pressure, DO NOT DRIVE WITH NO OIL PRESSURE. If it is making noise from the valve train, there is no pressure. Be very careful running it, you may ruin an internal engine part. If you can idle it until the noise lightens up, then you can drive as long as there is oil pressure.

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Are you trusting the Gauge or putting an In-Line Gauge?


If you put the In-line Gauge on and see that you have Good Pressure, then what you need to do is rebuild your Instrument Cluster.

MAKE SURE YOU USE X27.168 Stepper Motors... The Cheaper CHINEESE STEPPER MOTORS are black and are defective.

The X27.168 Stepper Motors are WHITE and will last for as long as you own the Truck.

Order 6 Stepper Motors and do them ALL at the same time or you can pay someone $95-$200 to rebuild it for you...


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My oil light is flashing red and making a dinging noise

Could just be out of oil. Check the oil. Don't drive it! If it has plenty of oil the oil sending unit maybe faulty.. Best have a shop check engine oil pressure with a mechanical oil pressure gauge before driving it.. Engine will be ruined if you drive it with no oil pressure.

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After driving for 5 to 10 mins oil light came on then engine started tapping. ended up changing oil and oil filter and still done same thing and now is tapping all the time.

It sounds like your oil sending unit is not functioning. When this goes out you lose oil pressure. When the oil pressure drops the oil does not circulate and then your engine does not lubricate and will seize up on you. That's the knocking you are hearing.The oil light is on because of the drop of oil pressure. I would stop driving that vehicle until that oil sending unit is repaired. If you do not repair this at home or where the vehicle is at the you will want to have it towed to the point of repair. You can test the oil sending unit with a pressure gauge beforehand too but it sounds to me like it is bad. Sometimes they are easy enough to switch out. If you give me your make and model and year of vehicle I can list the steps and location for you. Other wise have it towed to a mechanic. I would like to reiterate that you should not drive it anymore until it is repaired. The other thing that it could be is your oil pump. Either way stop driving it.
Regards, Tony

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Have a nice day. And have someone check your van.

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