Question about 2001 Jeep Cherokee

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Oil pressure dropping at idle now its tapping!!

The oil pressure has been dropping while my jeep idles & will go up when i push the gas but NOW a tapping sound is aroung the lifters!! what do i need to have done!!

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  • smb2121 Jul 20, 2009

    will that stop the tapping or have i torn something else up :(

  • smb2121 Jul 20, 2009

    will that stop the tapping or have i torn something else up :(

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  • Jeep Master
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You are going to have to drop the engine oil pan and replace the oil pump.

Posted on Jul 20, 2009

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1 Answer

Low Idle drops oil pressure


Raising the idle would only put undue wear on the transmission shortening it's life. If pressure is low, you may need to replace a worn oil pump. Or depending on the mileage and maintenance, you may need to rebuild the engine. I am driving a 97 5.2l with full tow package with 216,000 miles on it, and I service it faithfully. It still does't smoke or use oil. The pressure does drop to about 20 when idling ( On the dash gauge, who knows how accurate it is ) then goes up to 40 when accelerated to start out. Sounds to me that your problem may be oil pump. FYI if you have very bad gas mileage, I have found a trick that will increase it. replace the stock fuel injectors with 5 hole pontiff injectors from early 90's neons. They are a perfect fit & increased my mileage 25% +. Good luck

Jun 13, 2014 | 1997 Jeep Grand Cherokee

1 Answer

Oil pressure gauge drops to zero sometimes when idling. When gas is pressed to move the needle goes back up. It does not do it all the time


Could be the sending unit or an actual problem with the engine.
The oil pressure will be lower at idle than at road speed but should stay above 20psi.

Sep 27, 2012 | 1999 Jeep Grand Cherokee

1 Answer

Water logged my car & now it idles very high around 3000 rpm & wont drop unless you tap the gas


go to the test with scanner and computer for exactly diagnostic, otherwise you must waste time and money.
God bless you

Sep 18, 2012 | 2001 Pontiac Grand Am SE

2 Answers

Oil gauge drops low at idle


Low oil pressure at idle can be caused by an engine with worn rod or main bearings due to (usually) high mileage . This however does not mean the engine is still not serviceable as long as the oil pressure is low only at idle. The pressure should at minimum get into the normal range at anything above idle speed.Not much oil pressure is really necessary at LOW speed. At low speed, as long as there is oil getting to the bearings, even at low pressure, you are OK. In a high mileage engine the oil pressure is often low at idle simply because the oil pump is turning slowly and cannot maintain higher pressure between the larger than normal crankshaft and bearing clearances. As speed increases the pump turns faster and supplies more oil and the pressure should go higher. Low pressure as long as it is only at idle is not a problem. However at higher speeds the pressure should be in the normal range. Such a worn engine can benefit from higher viscosity (thicker) oil such as 20W-50 in above freezing weather and 10W-40 in winter. That will increase idle pressure and the thicker oil film maintains a better film between the worn parts

Apr 08, 2012 | 2002 Jeep Grand Cherokee

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

1 Answer

OIL PRESSURE DROPS WHEN ENGINE IS HOT. CHECK GAUGE LITE COMES ON.PICK UP RPMS LITE GOES OUT.IDLE PRESSURE DROPS & LITE ON


Is the car making any funny noises from the engine, Like a tick or knock?. Could be a oil sending unit. can't be sure without seeing the car

Nov 29, 2010 | 1999 Jeep Cherokee

1 Answer

My oil pressure is dropping and at the same time my car is idleing to where it seems like my fuel pump is dying. Are the 2 related. If I step on the gas the oil pressure picks up and the my car gets gas...


Your oil pressure will increase and decrease with the speed of the engine. As long as your oil pressure increases, that's ok. The idle problem could be caused by a dirty fuel or air filter. I would start with replacing the fuel filter and check the condition of the air filter.

May 14, 2010 | 2001 Jeep Grand Cherokee

1 Answer

Oil pressure drops when idling


check if oil filter is not clogged

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2 Answers

Oil pressure drops at idle


If there is no engine noise associated with this ow oil press reading then replace the oil pressure sending unit on the engine, it is defective, this is common on all cars.

Dec 18, 2008 | 2002 Jeep Liberty

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