Question about 2002 Chevrolet Blazer

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Low oil pressure while idling - 2002 Chevrolet Blazer

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If you don't have any abnormal internal engine noise the the most likely cause with this particular vehicle would be a partially clogged oil pump screen.Remove the oil pan to access and clean thoroughly.This should fix this concern.If you are burning oil or consuming it more than normal then suspect worn internal engine components causing this.

Posted on Oct 08, 2010

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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.

Jul 06, 2015 | 2003 Ford Expedition

1 Answer

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

1 Answer

Low oil pressure at idle 2008 cadillac escalade ext


if its low on an independent pressure gage then you could have worn engine bearings or a bad oil pump, pressure relief valve stuck open lowering oil pressure.

Aug 29, 2014 | 2008 Cadillac Escalade Ext

3 Answers

Oil light on after engine warm-up on idle


this means a mechanical gauge test is required to check actual pressure warm idling if low below 20 psi then the oil pressure pump relief is stuck open or engine bearing are worn

May 15, 2014 | 2005 Opel Astra 1.4

3 Answers

Adjust idle


previously answered

Aug 03, 2012 | 2005 Suzuki Forenza

2 Answers

What are the causes of low oil pressure alarm at idle?


could be low on oil could be a bad pressure switch if the engine had low oil pressure the engine will make noise

May 24, 2012 | 2005 Chrysler 300

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

3 Answers

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

2 Answers

1984 New Yorker 2.2 Turbo oil pressure low on ilde


I think you have a suspect oil pressure sender unit. Replace it as they are cheap and need to be reliable and it will be cheaper than getting the oil pressure tested. If the light still stays on with the new sender you may have internal wear or a partial blockage. If the light stays on you need to have it urgently checked by a mechanic or you could risk serious engine damage.

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1 Answer

95 Monte Carlo Idle Fast and Have low oil pressure


95 monte carlo is idling high we just replaced the intake manifold gasket. How do I fix this and could I have caused it.

Jun 13, 2009 | 1995 Chevrolet Monte Carlo

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