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HOW TO CHECK OIL PRESSURE WITH MECHANICAL GAUGE. CANNOT FIND ADAPTER TO SCREW INTO OIL PRESSURE SENDING UNIT

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Oil pressure sending unit


You should check the oil pressure with a mechanical gauge. If that gauge also reads low you probably have a major engine problem. If the pressure is normal on the mechanical gauge you have a problem with the electric gauge. Probably the sender, dash unit or wiring.

Mar 28, 2014 | Chevrolet Colorado Cars & Trucks

3 Answers

The oil light on my 1998 Camry is on but I just got the oil changed


If it is the oil pressure warning light showing, the next thing to do is to remove the oil pressure sender unit and screw in a gauge to see if the sender is at fault.


http://www.2carpros.com/questions/2001-jeep-wrangler-2001-jeep-wrangler-oil-pressure-gauge-drops-and-oil-light-c


After that it could be that the over-pressure relief valve in the oil pump has stuck open.

Jan 16, 2013 | 1998 Toyota Camry

1 Answer

1993 chevy pickup z 71 driving down interstate and check gauge light came on and oil presure dropped to 0. Truck died and cant start again


It could be the oil pressure sending unit, or the engine could really have no oil pressure.
If the oil pressure dropped to zero at highway speed, I would expect the engine to lock up or at least make alot of noise.
You may have to tow it home and check the oil pressure with a mechanical gauge, or replace the sending unit to see if the gauge on the dash reads pressure.
The fuel pump gets power from the pump relay at startup, then runs off power from that oil sending unit when the engine is running.

Dec 19, 2012 | Cars & Trucks

1 Answer

Low engine oil pressure on a 1997 cadillac catera. I suspect the sending unit. Would like to check with a manual gauge. Where to tap in to engine oil pressure?


in order to check the oil pressure, you have to remove the oil sending unit, then screw in the adapter of the oil pressure gage, and then remove the start relay or fuel pump relay from the fuse and relay box, under the hood on the drivers side, and then crank the engine over 3-4 turns, and then record the oil pressure, and then disconnect the oil pressure gage, and then re install the oil sending unit, replace the start relay or fuel pump relay, and then start up the car, and check the oil sending unit , to make sure it is not leaking, if your oil pressure checks out within the specs, then you are fine, if it gives you a low reading, then you could have a bad oil sending unit , or a oil pump going bad on you. i would replace the sending unit first, then see what the gage shows.

Jun 13, 2011 | Cadillac Catera Cars & Trucks

1 Answer

Oil light came on and low oil pressure or no oil pressure. But oil level is fine. 2003 Chevy sierra


spend the 12 dollars and get a universal mechanical oil pressure gauge, remove the oil sending unit on truck and screw new gauge into and start truck. Does it read pressure? I know people will say just replace oil sending unit but i like to visually check for a true oil pressure than to trust a light, at least you will know what pressure your motor has. if you have pressure then replace the sending unit. Most of the time when the sending unit goes bad your oil pressure gauge in the truck will run at 80 psi all the time. Since you have a light the sending unit just says it isn't getting pressure which turns a light on. So be safe and do as i suggest, if there is no pressure at the mechanical gauge then i hate to say it but you may have a bad oil pump. I honestly just think you have a bad sending unit,if you want just replace it and if lights go off thats good, but you still don't know what the pressure is and if you feel comfortable with this then do so.

Feb 04, 2011 | 2003 Chevrolet Tahoe

4 Answers

Check gauge light is on and oil pressure gauge at zero. Oil at full on stick?


Sounds like you have a bad oil pressure sending unit, the oil pressure sending unit controls your oil pressure gauge, what I would do is remove the oil pressure sender and hook a manual oil pressure gauge up to your engine and verify you have sufficient oil pressure, if you have good oil pressure on your gauge then replace the sending unit, if you have a low reading on the gauge stop your engine immediatly and start looking at a potenial problem with your oil pump or lubricating system within the engine....

Dec 09, 2010 | 2004 Jeep Grand Cherokee

2 Answers

Low oil pressure


If the engine is not making any noise.It is probably the oil sending unit that is defective.If you want to be sure you will have to install a pressure gauge and check the pressure when the vehicle is at normal operating temperature.If it is above 10 psi then replace the sending unit.It is located on the back of the motor on the block by the left cylinder head.You might need a special socket for it.Hope this helps.Good luck.

Jan 12, 2010 | 2004 GMC Yukon

2 Answers

Oil pressure loss


the 1st thing u do is have the oil pressure tested with a test mechanical gauge by a shop, most times it is just the oil pressure sending unit is defective, but never assume that is the problem, low oil pressure will distroy a $5000.00 engine very quickly, u can just try a new sending unit, but highly recommend a pressure test with a mechanical gauge before you run the engine anymore.

Dec 05, 2009 | 2000 Jeep Cherokee

2 Answers

Fluctuation on the oil pressure gauge reading


The oil pressure sending unit is a sensor with an internal diaphragm, if the internal diaphragm is damaged , or the line to the diaphragm is blocked you can get this kind of fluctuation on the oil pressure gauge.

The oil pressure value must be read by installing a mechanical gauge near to the oil pressure switch and checking the pressure.

If pressure is ok, replace the sending unit. If there is a real pressure drop, check the oil pump.

If you still get fluctualtion after replacing the oil pressure sending unit, replace the oil pressure gauge.

Nov 24, 2008 | 2003 Toyota Sequoia

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