Question about 2005 Nissan Armada

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My oil pressure keeps dropping at idle. - 2005 Nissan Armada

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  • jack_baker1 Apr 29, 2010

    It is not low on oil. how can I fix this?

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Weak oil pump or low on oil

Posted on Apr 29, 2010

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00 lincon navigator 5.4 oil pressure drop's low and light comes on , engine idles rough when pressure drops ,then pressure return s to normal range ,light goes out ,engine runs perfect. Is it my oil


Sounds more like an engine idle issue than a oil pressure issue. If the engine idle drops too low, the oil pump cannot provide sufficient oil pressure. If there is no oil light when the engine is idling normally, then there is no problem there.

Dec 25, 2014 | 2000 Lincoln Navigator

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Oil pessure drops to 0 when engine warms up


it appears that the pump pressure relief valve is stuck and is not sealing off the oil system to allow pressure to build up at idle. It may be necessary to remove the oil pump and pressure relief valve for checks /repairs.

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1999 JIMMY OIL PRESSURE drops with RPMs after warm


Normal is 10w30.
If the oil pressure gauge is correct, my guess would be worn engine bearings and / or oil pump.

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1996 Ford 300 six cylinder loses oil pressure when engine warms up


first you will have to say what the oil pressure is cold, idle and 2000 rpms and then hot idle and 2000 rpms before a decision to advise about a rebuild can be made
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May 26, 2017 | Ford F-150 Cars & Trucks

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1995 Ford Econoline 150 with 302 engine. Oil pressure indicator starting dropping when idle speed went down, Had a new oil pump and sending unit replaced, still does the same thing. Has 190K on it, now as...


When you had the pump replaced did anyone look at the rod and main bearings? 99% of all low oil pressure problems I've seen has been directly related to bearing wear, not a bad oil pump.
Replacing the pump will give you slightly better pressure temporarily but that won't last very long.
Verify the actual oil pressure using an external mechanical gauge. If it's low (likely it is) go back into the oil pan and use plasti-gage on the bearings to measure clearances.
In reality though, in an engine with that many miles, it's best to either completely rebuild or replace it though.

Sep 10, 2011 | 1995 Ford Econoline

1 Answer

Oil pressure is normal until it reaches200 degrees then oil presure drops to 10 pounds at an idle but give it gas and it goes up when its first started oil pressure is at 40 pounds until it reaches 200...


Oil pressure drop after reaching operating temp is normally caused by worn main bearings (depending on mileage).Worn bearings will allow pressure drop at idle and increase when accelerated above idle.

Jul 14, 2011 | 1999 Chevrolet Blazer

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My oil light flickers on and off at low idle what do you think is wrong?


You have answered your own question. You idle is too low. Check all hoses, and gaskets for leaks.

Oct 10, 2009 | 2002 Dodge Intrepid

1 Answer

Oil pressure on my 98 jeep keeps droping down to 10- 20 lbs .


The low number bothers me...some people will tell you that 10lbs is fine, however this engine generally runs at least 30 at idle hot, sometimes a bit lower but not much.Pressure drop hot is because the oil flows easier when warm, and internal clearances change as well. First, I would have the pressure verified by using a mechanical gauge (yours is electric) If actual pressure is the same as your readings, I'd change the oil and add marvel oil to remove any deposits which may be on the pump pickup screen. Check oil you drained for fuel smell to make sure it's not contaminated.
If pressure does not improve, or drops further, you are going to have to drop the pan and check for bearing wear.(pumps generally don't go bad...wear at the bearings allows pressure to escape) If you find any bearings out of tolerance, change them and the pump as it may have some internal scoring from debris.

Jun 06, 2009 | 1998 Jeep Cherokee

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