Question about 1994 Cadillac DeVille

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My engine for my 1994 devvile is nocking from the bottom after i

Drive for 10 minutes the low oil presure lite comes on when the car stops and idles

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  • cleveland219 Apr 23, 2009

    i did that should i put a thicker oil in it

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  • 718 Answers

Check the oil level. Make sure you have the right grade of oil. Now check the oil pressure sensor. It may need to be replaced.

Posted on Apr 22, 2009

  • marionbagget Apr 23, 2009

    I am not recommending thicker oil. I take it you have a good oil filter.

    This sounds like it is a problem with the oil sending unit. It could be a dirty contact or the unit should be replaced.

    I believe this will fix it.

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2 Answers

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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1 Answer

Low oil presure while driving


im sorry there is no pressure off.
running pressure is low because.
1: wrong oil, or AF in oil, or brake fluid from jiffyboobs. or water.
2: fuel in oil , bad bad bad.
3: dumping additives it it. bad.
4: BEARINGS IN ENGINE SHOT. (warn bad)
5: THE GAUGE FIB'S.

I NEVER NEVER NEVER trust car gauges, i use MINE>(in hand)
i also test my hand gauges, (ask)

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Engine dies


if it shuts off while driving down the road. and restarts after 10 minutes, its usually a bad crank sensor that does this. it messes up timing and shuts off fuel supply.

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1 Answer

99 silverado oil presure problem oil pump in front of engine


They may be right. Too much clearance on the bearings is where you lose oil pressure, or so I've heard. If you bought it used, someone may have once run old, dirty oil in it too long, or let it run low. You could drop the oil pan and check the bearings or replace them.

May 29, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

When bought engine idled @ 800 rpm when warm, now engine lite is on and engine idles rough @ 500 to 600 RPM. Replaced rack and pinion, power steering, checked wires, replaced sparkplugs, # 1 plug was in...


could be numerous reasons. this is your best bet take it in to a mechanic and have your engine codes scanned. it is a minimal charge, some even do it for nothing it only takes 10 minutes.this will point you in the right direction.

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1 Answer

Oil pressure gauge goes to 0 when idled, but goes


You could try thicker oil or stop using synthetic or add some lucas oil treatment or change the oil. The sender could be bad too. A diag is in order because if there is no presure the engine will soon die.

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3 Answers

Oil Pressure Light Comes On after 10 min of Driving


You may not have put the right amount of oil in your car, your oil pressure sensor could be faulty, or you may have a leak.

By revving your engine, you're increasing the pressure and thus turning off the light and making the sensor think that it's at the correct pressure.

Sep 08, 2009 | 1998 Chevrolet Malibu

2 Answers

Strong pungent rotten egg smell while driving ,with car cuttingof


You have an oil leak. Chances are the valve cover is seeping oil onto the exhaust manifold. Also the drip lite on your dash means that you are low in oil. So check the oil , add if needed. The bigger problem is that if the car is high miles. You have worn rings which is presurizing the valve cover which is causing it to seep out. It would also explain the oil indicator lite on the dash. If money is tight you just need to check the oil level once a weak and add. Milk it. Otherwise its and engine overhaul, big money. good luck.

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1 Answer

How to replace valve cover gaskets on 1995 BMW 530I


sounds like a leaky oil presure switch. they will leak oil out of the wires comming out of them sometimes saturating the connector of the switch. If that isnt the problem then your oil pump is weak causing the lite to come on or your leak is so bad your oil level is so low the lite is coming on

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