Question about 1995 Chevrolet Astro

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Oil pressure gauge

My oil pressure gauge reads high

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9 times out of 10, it is a bad oil pressure sending unit.

Posted on Nov 29, 2013

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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

SOURCE: oil pressure gauge reads past 80

now unless there is a very loud knocking of the motor which would mean that the engine's top end was not getting any oil I would say that your oil guage is sprung and needs replacing. a high pressure rating would indicate a restriction in the oil flow pasdt the sending unit or a plugged oil filter. if the filter were plugged you would know it because your enging would run tight in no time at all. replace the guage itself... please rate this........thanks

Posted on Sep 29, 2008

csmock132
  • 4669 Answers

SOURCE: oil pressure gauge is showing max pressure. Figure that sensor is bad???

I agree with you, replace the oil pressure sending unit.

Posted on May 07, 2009

  • 5 Answers

SOURCE: oil pressure gauge

Common problem with the sending unit on the LT1, pegs the oil pressure gage. You have to replace the sending unit and the intake manifold has to be removed to get to it. Get new intake gaskets I think PT#12533587 about $80 good guy price and I do not remember the PT# or price for the sending unit. sebring1962@yahoo.com

Posted on May 15, 2009

  • 225 Answers

SOURCE: 1984 Chevrolet 454 oil pressure gauge reads maximum all the time.

faulty gage,replace

Posted on Jun 17, 2009

  • 107 Answers

SOURCE: 2004 Trailblazer strong smell of exhaust/rotten eggs in interior

sounds like you have a plugged convertor

Posted on Jul 11, 2009

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1 Answer

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

Oct 24, 2015 | 2001 GMC Yukon XL

1 Answer

Oil pressure gauge reads high only when engine is running,oil level is fine


that is a sign of the wrong oil grade. that truck takes 5 w 20 oil

Jan 26, 2013 | 2005 Chevrolet Silverado

2 Answers

How can i fix the oil pump


see this tips and fix it. God bless you
The oil pump supplies oil to lubricate your engine. If the oil pump is worn or is not turning, the engine will suffer a loss of oil pressure, which may result in engine damage or engine failure.
The first sign of trouble may be a low oil pressure warning light, a drop in the normal reading on you oil pressure gauge (if your car has one), or the appearance of ticking or clattering sounds from your engine.
As a rule, most engines only need about 10 PSI of oil pressure for every 1,000 RPM of engine speed. Oil pressure will read higher than normal when a cold engine is first started because the oil is thick. Oil pressure will gradually drop as the engine warms up and the oil thins out. So normal oil pressure on a warm engine cruising down the highway is typically 30 PSI up to 45 PSI.
SYMPTOMS OF OIL PUMP TROUBLE
The first thing you should do if any of these symptoms occur is to stop your car, turn off the engine, let it sit for a few minutes, then check the oil level on the dipstick. If the oil level is at or below the ADD line, add a quart of oil to bring the level back up to the full mark. Add as much oil as is needed to raise the level to the full mark. Then restart the engine. If the warning light remains on, or the oil pressure reading does not climb back up to its normal range, or the engine noise does not go away, you may have a bad oil pump.
The other possibilities include a bad oil pressure sending unit, or a problem with the oil pressure warning light circuit or oil pressure gauge.
OIL PRESSURE SENDING UNIT
If the engine is NOT making any unusual noises and seems to be running normally, and the oil level on the dipstick is FULL, but you are still getting a low oil pressure warning light or low gauge reading, the fault could be a bad oil pressure sending unit.
The oil pressure sending unit is mounted on the engine block. On some applications, there is a spring-loaded pressure-sensitive diaphragm with a switch inside the sending unit. This switch completes the circuit to the low oil pressure warning light if oil pressure drops below a certain threshold. The unit may stop working if the diaphragm inside fails, if the switch is stuck, if the small hole that allows oil to enter the sending unit becomes plugged, if there is a loose, corroded or broken wiring connector at the sending unit, or there is a fault in the wiring circuit between the sending unit and warming light.
On vehicles that have an oil pressure gauge (electronic, not mechanical), the oil pressure sending unit has a small rheostat inside that sends a variable voltage signal to the oil pressure gauge when the diaphragm moves. A worn spot on the rheostat or any of the other problems just described for the simple pressure-type oil pressure switches can cause a problem.
FORD'S FAKE OIL PRESSURE GAUGE
On many Ford vehicles that were built from 1980 through the 1990s, the oil pressure sending unit has two switches, a low pressure and a high pressure. These vehicles also have an oil pressure gauge, but the reading on the gauge is not a true indication of real oil pressure. As long as the pressure to the sending unit is between high and low, the gauge will read normal. If oil pressure drops and trips the low pressure switch, the dash gauge will now read low. Or, if oil pressure goes up and trips the high switch inside the sending unit, the dash gauge will read high. Consequently, don't rely on the oil pressure gauge for an accurate reading in these vehicles. It is only a gross indication if the oil pressure is low, normal or high.
OIL GAUGE PROBLEMS
If the engine is NOT making any unusual noises and seems to be running normally, the oil level on the dipstick is FULL, and you have replaced the oil pressure sending unit but are still getting a low oil pressure reading on the dash gauge, the fault could be in the wiring circuit between the sending unit and gauge, or the gauge itself might be bad.
Check the wiring connections on both ends as well as wiring continuity between the sending unit and gauge. If no wiring faults are found, hook up a pressure gauge directly to the oil pressure port on the engine and check oil pressure with the engine running. If the engine-mounted gauge shows normal oil pressure but the dash gauge is reading low, the problem is a bad dash gauge.
On the other hand, if the engine-mounted pressure gauge reads low and you have done all of the above, chances are the oil pump is worn, or it is not picking up enough oil because of a restriction or blockage in the pickup screen in the bottom of the crankcase.
OIL PUMP PICKUP PROBLEMS
The pickup tube has a screen on the end to prevent large chunks of anything bad that ends up in the crankcase from being sucked into the pump. But we are talking BIG chunks of debris, not normal wear particles or carbon or dust or other microscopic-sized abrasive particles that can cause pump wear over time.

Sep 28, 2012 | 1996 Toyota Tercel

1 Answer

My oil pressure gauge is reading high on my 92 pontiac bonnieville sse


I suggest you check your oil pressure with a manual gauge to know the exact oil pressure. If it reads different then it's the sending unit or the gauge itself that is the problem. Most often it is the sending unit. I hope this helps.

Jul 16, 2011 | Pontiac Bonneville Cars & Trucks

2 Answers

My 2005 Nissan Armada is reading oil pressure abnormally high. The gauge is maxed out.


  • Well it could be a bad oil pump or a bad Oil Sending Unit. If you have an oil pressure gauge you can pull the sending unit and stick the pressure gauge in there and see what the reading is. I would thing 60PSI would be suitable.
  • I believe this Oil Sending Unit is on the front (possibly the back) of the oil pan.
  • Just remove the connector and put a wrench (or a deep socket) and twist it out and replace with a new one.
  • Make sure the oil filter is snug and not leaking as well.
  • Check your oil level too and make sure it is properly filled.
  • Good luck and thank you for using FixYa.

Regards, Tony

Jun 13, 2011 | 2005 Nissan Armada

1 Answer

Oil pressure really high


get the oil pressure sender and gauge checked most likley cause is incorrect reading not sudden high oil pressure

Oct 22, 2009 | 1991 GMC Sierra

1 Answer

1993 Jeep Grand Cherokee, V6. Oil Pressure Gauge Read High.


it could be the sensor you should look at the oil pressure relief valve

Jun 10, 2009 | 1994 Jeep Cherokee

1 Answer

Oil gauge goes up and down.


If grounding the dash does not work, try putting a mechanical gauge on it and reading actual oil pressure. Pressure does change while driving, but should not wander. With mechanical gauge, check that running hot at idle (in gear if automatic) pressure should not drop lower than 15psi (I'd rather see 20) High reading should be around 40 -50 but no higher.Low pressure indicates a loss of supply or bad bearing on the crankshaft, high pressure may be caused by sticking pressure relief or restriction in an oil passage.

Apr 19, 2009 | 1997 Jeep Wrangler

2 Answers

High oil pressure reading


Oil sending unit bad. Replace.

Mar 01, 2009 | 1989 Pontiac Bonneville

1 Answer

1992 jeep wrangler oil pressure goes off scale while accelerating


try replacing the oil filter and oil make sure u use the right grade oil for it if it still does it u need yo go to mechanic or if u have one connect a external oil pressure gauge to the engine to check if the car gauge is reading correctly if it is reading right then the oil pressure releif vale is stikking

if the car gauge is reading wrong change oil pressure sender

Dec 20, 2008 | 2002 Jeep Grand Cherokee

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