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Intermittent "low oil pressure" readings - 1997 Cadillac Eldorado

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First have you checked your oil level? If you have the proper oil level then most likely your oil pressure should be good. Do you have any leaks? How many miles are on the vehicle? It could very well be the low oil pressure switch failing. located on the oil filter adapter. These are known to fail, only cost about 10$ and about 30 minutes to change. If you have any doubts that your oil pressure isn't good have it checked by a qualified mechanic.
Thank you,
Lee

Posted on Aug 27, 2010

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Has 358000 miles, just had leaks repaired. Twice since my oil pressure gauge reads no pressure but not all the time? Why


1. Oil Pressure Gauge Not Working You will notice this happens when your oil pressure gauge is not reading, whether the engine is turned off, idle or running. Try to step on the gas to rev up the engine. If the oil pressure gauge still doesn't change its reading, your gauge is busted. It's best to replace it as soon as possible because you won't have any idea if your car is already overheating or not.
2. Oil Pressure Gauge Reading Too Low When your engine is idle, the oil pressure gauge will have a low reading. When the engine starts running or when you're already cruising or on the freeway, your gauge's reading should have increased. If it stays on a low reading, then you now your oil pressure gauge is broken.
3. Oil Pressure Gauge Reading Too High Another common oil pressure gauge problem is when your oil pressure gauge is reading too high when your engine is idle or when it's turned off. Rep

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How can I fix my car with the oil light coming on. The engine does intermittent jerking during driving


Oil light usually indicates LOW oil pressure.. Which will kill your engi ne and cause very expense repairs. FIRST Check oil level, If the level is good. You need to find out if the engine really has low oil pressure. A new oil pressure switch is about $8.00 you might start there. If the light still comes on its a good posibilty your car has bad oil pres.. To find out for sure you will need to install a Pressure guage and check the actual pressure.. If the Oil Level is good and you still have low oil pressure The engine has internal wear or damage.. You should not drive it till you fix the low pressure problem. rebuild or replace engine. The intermittant "jerking" can be unrelated to the oil pres problem or you engine is going away because of the pressure problem.

May 14, 2014 | 2001 Nissan Altima

1 Answer

Oil pressure


Usually a sign the oil pressure switch is faulty, or the engine may in fact have low oil pressure at idle. You would replace the switch and / or have the oil pressure checked with a mechanical gauge.

Jul 05, 2013 | Cars & Trucks

1 Answer

Oil Pressure All of a sudden reads very low and Check gauge light on


you might want to make sure your oil pump is working,if it is not a sencer and see if you have an oil leak

Mar 16, 2013 | Cars & Trucks

1 Answer

Buick rendezvouson 03 oil pressure light goes on and off so i ran my car till funny noise then engine stop i try to restart notting just a tick sound the Repair Services guy told me that engine .Someone...


usually the oil pressure light means your oil pressure is low. zthat casn be mechanical breakdoown of the oiling system, low oil level, or a worn engine. Low oil pressure caused failures are usually either fatal to the engine or drastically reduce its life span. Whether it is a faulty sensor or an oil delivery problem you should noot drive with the oil light on or the gauge reading no pressure An engine without oil will overheat metal parts beecaause the oil pressure prevents wear on parts by essentially floating them on an oil film at pressure. This is more important than any other fluid and losing oil is your engine bleeding to death. so why did you keep going Most likely you had both an oiling problem and a sensor that was intermittent. zthey are normally on and engine oil pressure deactivates them.

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1 Answer

Oil pressure indicator lamp illuminates intermittently


1. check oil level now! If low, add as needed, and keep checking regularly.
2. If level is OK, check oil pressure switch (or sending unit), and the connections at the switch.
3. Have the oil pressure measured by a good mechanic. If the pressure is good, it means that the problem lies somewhere in the pressure sensor or indicator circuit. If the pressure is low, there is a problem in the engine - either a clogged oil filter, bad oil pump, or blockage within the engine.

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1 Answer

How do I check and possibly replace the engine oil pressure sensor in a 2006 GMC Envoy Denali?


Oil Pressure Test Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge. A tachometer may also be needed, as some specifications may require running the engine at a specific RPM.
  1. While the engine is cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Note and record the oil pressure reading when the engine is cold. The engine may need to run at a specified RPM, if so check the vehicle's specification.
  5. Run the engine until normal operating temperature is reached.
  6. Check the oil pressure reading again with the engine hot and record the value. Turn off the engine.
Compare the hot oil pressure reading to the specification. If the reading is low, check the cold pressure reading against the specification. If the cold pressure is well above the specification, and the hot reading was lower than the specification, the engine may have the wrong viscosity oil. Change the oil, making sure to use the proper grade and quantity, and then repeat the test.
Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

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1 Answer

Where is the oil pressure sensor located on a 1996 murcury cougar


Look for the oil pressure sending unit on the block or the cylinder head on the V-6 or V-8 models. --- OIL PRESSURE TEST Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge (as opposed to relying on a factory installed dash-mounted gauge). A tachometer may also be needed, as some specifications may require running the engine at a specific rpm.
  1. With the engine cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Check the oil pressure reading when cold and record the number. You may need to run the engine at a specified rpm, so check the specifications.
  5. Run the engine until normal operating temperature is reached (upper radiator hose will feel warm).
  6. Check the oil pressure reading again with the engine hot and record the number. Turn the engine OFF.
  7. Compare your hot oil pressure reading to specification. If the reading is low, check the cold pressure reading against the chart. If the cold pressure is well above the specification, and the hot reading was lower than the specification, you may have the wrong viscosity oil in the engine. Change the oil, making sure to use the proper grade and quantity, then repeat the test. Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

Sep 09, 2010 | 1996 Mercury Cougar XR7

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I have a 1998 gmc sierra and mt oil pressure gets low after engine warms up ive been told its my rod and main bearing but i think it could be the oil pump but im not for sure please help


Well, they may be right in saying that normal engine wear is causing this problem as the distance between the bearings and the oil passages gets bigger, the oil pressure drops.

If you want to spend the money on a new oil pump, you can, but there is no guarantee that will solve the problem.

You're right, the oil pump's passages might be wearing along with the rest of the engine causing this gradual low oil pressur problem.

Have you had the oil changed along with the filter to see if maybe there's a circulation problem in the engine?

I had low oil pressure on my 1997 Cadillac Deville Limousine, that was intermittently flashing the low oil pressure light.

I read that it's recommended to change the oil to the proper viscosity and that seemed to clear up my problem on my GM Northstar engine.

It's worth a try.

Good luck on this repair.

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1 Answer

The "check gauges" light comes on intermittently on my 2001 jimmy


First thing I'd check is the oil level, coolant level. The check gauges light is illuminating because on of the gauges is below a certain pre-programmed threshold. The light is very similar to the old idiot lights that came on when it was too late. Cars used to have gauges and in the earlly 90's the manufacturers figured out that the majority of owners did'nt even read the owners manuals, let alone know how to read a gauge. So they started putting in idiot lights that would come on when there was a problem, they figured even an idiot could see a red light on and know there was a problem. The only problem was that the pressure switches that turned the lights on were set very low. Take for example an oil pressure switch (OPS). The switch is designed to close and complete a path to ground for a light, the problem is it closes aroung 3psi. Normal oil pressure is around 30, at 3 psi the cam and crank bearings are starving for oil, by the time you see the light on it's too late, the damage has already been done to the engine. So the manufacturers started installing gauges and lights to cover all the bases. So if I had to take a guess, I'd say you have and oil pressure problem. Check the oil, if it's low figure out where it's going, if it's not then you may have a faulty sending unit, confirm this by installing a manual oil pressure gauge in it's place. If the manual gauge shows low oil pressure then there may be some debris/sludge floating around in the oil pan stopping up the pickup screen or it could be a faulty pump.

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