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Oil pressure light flashes on when car idles had new oil new switch and new pump

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Double check electrical connections at the switch and also the wiring (chaffing or bare wire - maybe pinched)

Posted on Mar 12, 2011

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How can I cheat the Idle up? I'm getting a low oil pressure light at Idle, 800 RPM. I would like to increase the Idle to 1000 to keep from getting the light.


that wont work trying to adjust idle can be done on older cars with a carburetor or the older throttle bodies new vehicles trying to do it will set off check engine lights on most sensors sound more like oil worn out---oil filter or pump problem change oil and filter and do a flush ---and put in an additive such as lukas - royal purple etc---also why did head need replacing was oil pump tested

Aug 02, 2016 | 2006 Suzuki Forenza

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Why is oil light flashing?


Petrolheads (applies to dieselheads as well) often joke that the oil pressure warning light fitted to cars is really a "your engine has just gone BANG" light - it's set at such low pressure that it's no warning at all, just a sign that failure has already happened.

It'll need a major investigation and only then can you assess whether it should have been predicted during service. Espesially if you hear friction noises or metallic scraping. You want to figure this out now before it comes on solid.

You could check the serpentine belt for tension.
To my knowledge the oil pump isd hooked up at the alternator.
Is the battery voltage normal at running engine (14.x volts) ?
Maybe the oil pump is not pumping right so you may have enough oil but it isn't pumped around enough.
Was the engine temperature going up when it happened?

Also was the car going down in RPM's?
What is it idleing at?
If she is idleing low try cleaning out the IAC
The iac is a small sensor that sit's on top of the engine at the back just a little left of where the accordian hose hooks to the throttle body from the air cleaner. It has a electrical connector coming from it and should be found close to the intake where the flapper valve is. (after the MAF)

If the RPM are at factory spec try replacing the oil sending unit. IF that is not it your engine is just worn






Feb 11, 2016 | 2005 Hyundai Sonata 2.4

2 Answers

3.5L V6. Why does oil pressure light turn on intermittently?


1. As a basic measure I would make sure the correct grade and spec oil is going in the engine. You can no longer trust that a local mechanic or even a dealer service center will necessarily use the required product as stipulated by the manufacturer. It is always better to buy and supply your own so you know the correct product is being used.

2. I would not assume there is a problem with the oil pressure warning light even though there could be.
The first thing the mechanic should have done when you reported the oil pressure issue is to hook up an independent mechanical oil pressure gauge and check oil pressure when the engine is hot at different RPMs. Any oil pressure issue will usually show up at idle when the engine has been warmed up properly and the engine oil is hot (unless you have some kind of intermittent oil pressure relief valve that is sticking). Just replacing parts without actually knowing what the oil pressures are at different RPMs is being sloppy and negligent.
This is what you need to do now. Contact a business that can hook up their own pressure gauge to your engine and have them check the oil pressure readings at various RPMs when the engine is fully warm. If there is a low oil pressure issue it will show up on the oil pressure gauge. As you have a new oil pump there should be no issue now with oil volume or a sticking oil pressure relief valve which on your engine should be part of the oil pump assembly.

3. Worn engines will not be able to sustain required oil pressures. Oil pressure is not produced by the oil pump. The oil pump produces oil flow but the resistance to flow is what produces the oil pressure and that resistance is created by fine clearances between operating engine parts especially on the crankshaft and components connected to it. Once the engine wears the clearances increase and the oil flows past the parts much more easily and produces/builds much less pressure.
How well your engine with over 90000 miles has been maintained depends on how often all the owners changed the engine oil and filter , whether they kept the engine oil level up to full (most owners rarely ever check oil levels between services) and whether they always used the correct product. Manufacturer oil change intervals shown in service schedules can be 10000, 12000 miles or more which is much too infrequent for the type of use 95% of private vehicles experience which typically are on the severe to very severe use end of the spectrum. Engine oil typically needs to be changed at least at half the mileage shown in service books (at least twice as frequently) and thus at least every 5000 miles if you want your engine to last.

Feb 01, 2016 | 2011 Hyundai Santa Fe

2 Answers

Oil light flashing


oil light means loss of oil pressure.. not good ..check oil level fill to full if low..low oil pressure will cause fuel pump to be shut off..

Dec 08, 2013 | 2001 Ford Escape

1 Answer

Oil light intermittent on/off


1 idle speed set too low 2 oil pressure switch 3 low oil 4 clogged oil pump screen 5 faulty oil pump 6 worn main bearings 7 short in electrical circuit for light

Dec 06, 2012 | 1991 Chrysler New Yorker

1 Answer

1999 chrysler sebring low oil pressure at idle


It may be the oil pump. If the gauge is going up when the rpms increase it's probably not the gauge or pressure switch. If the computer senses the oil pressure is low it will shut the vehicle off to try to save it's self from catastrophic failure. Also it may start cranking longer before starting. Thats it building oil pressure before the computer will let it start. Make sure oil is full, clean & thick.

Nov 05, 2012 | 1999 Chrysler Sebring

1 Answer

Oil light comes on when idling oil level is good


faulty oil pressure switch (cheap), worn oil pump (not pumping enough oil at low revs) but most likely worn shells or crankshaft (allows oil to pass too quickly lowering oil pressure - just not noticable when the engine is reving 'cos there's a lot more oil bieng shifted by the pump)

Oct 02, 2012 | Ford Cars & Trucks

1 Answer

Car oil light is coming on when i brake. no unusely sound in the car or motor sound also the service engine soon light has been coming on


Well i hope its not the oil pump because the oil pump works with the speed of the engine when it turns and as you know when the engine turns fast the oil pump turns fast too and the more you accelerate the faster the oil pump turns, that means there is more pressure of the oil to go up top the engine and when the engine idles, The pump turns slowly, and doesnt pump enough oil up top the engine and the oil pressure switch dosent detect any oil passing by then it send a message that the pressure is low. So check your oil pressure during idle. Good luck Bro

Dec 11, 2010 | Mazda MAZDA6 Cars & Trucks

1 Answer

The RED LIGHT low oil pressure comes on and off The dash board display flashes STOP,The engines full of clean oil at the right level. how can i test the oil pressure??? do i have to the engine...


DO NOT DRIVE IT.try an oil pressure switch first and if no better,worry,the minimum will be a new oil pump....(if you drive it and it is the pump, you will need a new engine.....)

Sep 18, 2010 | Volkswagen Passat Cars & Trucks

1 Answer

Oil light stuck on


This light is flashing due to a low engine oil pressure signal, this may be a real issue of low engine oil pressure or a defective pressure sensor on the engine, replace the sensor first and see if the light goes out, if not u have a possiable engine oil pump problem.

Dec 29, 2008 | 1997 Nissan.5 Altima

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