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To "High" of oil pressure

To high of pressure keeps building up even at an idle

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What is the make and model and how do you know the pressure is too high?

Posted on Jul 21, 2013

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Posted on Jan 02, 2017

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SOURCE: compressor will not build pressure

compressor will not build pressure

Posted on Feb 28, 2009

  • 1388 Answers

SOURCE: pressure switch out of adjustment

Before you adjust the perssure switch, make sure that the intank check valve is not leaking pressure back to the pressure switch after it cuts off at 140psi. The check valve should hold pressure at 140psi. Follow the discharge airline to the tank to find the checkvalve (either chrome or brass with large cap). To check for leaking valve, run compressor till shut-off at 140, then unplug the compressor from wall and remove the 1/4 air fitting at the checkvalve and check for leak. If leaking, replace valve and leave the pressure switch at present setting. You should be good to go. Good Luck with your repair and email if you have questions.

Posted on Apr 04, 2009

  • 250 Answers

SOURCE: my compressor keeps slowly building air after it

It is not opening the bypass valve all the way see if there is a adjustment so that it pushes the valve open farther when it slows down.

Posted on Mar 19, 2011

  • 67 Answers

SOURCE: pressure release keeps kicking off

The pressure switch is faulty needs to be calibrated.

Posted on Jun 22, 2012

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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.

Jul 06, 2015 | 2003 Ford Expedition

1 Answer

OIL LIGHT KEEPS FLICKERING WHILE IDLE


Most likely your sensor is too sensitive and detects the low oil pressure that exists in idle .... you oil pump is not functioning fully and at idle fails to produce the right pressure. Lastly,your idle could be set too low. try increasing the idle slightly (you don't want it too high) and see if that solves the flickering light problem

May 30, 2014 | 2004 Ford Escape

1 Answer

1989 chevy c1500 truck has rebuilt engine, goes dead sometimes. engine doesn't sound even in tone when idling. More likely to cut out when. air conditioner is on. Oil pressure gauge jumps around o


You just need to find an older Repair shop that still has the old test gauges. Every so often the Onboard computers are replaced with more capable models. The connectors are different, so you need the proper old style diagnostic scanner.
You can still use the old style Vacuum gauge to diagnose some things and set the carburetor. You should have an electric/vacuum solenoid on the carburetor to compensate for the A/C running at idle. Someone may have disconnected it, or adjusted the idle speed missing the solenoid.
You do not want to have high idle rpm just because you have an A/C; its suppose to adjust when the A/C cycles off and on and maintain a stable idle.
That said, the oil pressure may be more steady at idle if the RPM is steady. Now for fluctuating oil pressure at high RPM, you may have a bad fit inside the oil pan with the oil pump pick-up tube. There are pressure relief springs in some oil pumps, oil filters have relief springs, and your oil pressure gauge may be wrong.
Oil pressure gauges are not a major expense, or even have a Mechanic hook up a test gauge temporarily to verify pressure.

Jun 18, 2013 | Home

2 Answers

Oil gauge drops low at idle


Low oil pressure at idle can be caused by an engine with worn rod or main bearings due to (usually) high mileage . This however does not mean the engine is still not serviceable as long as the oil pressure is low only at idle. The pressure should at minimum get into the normal range at anything above idle speed.Not much oil pressure is really necessary at LOW speed. At low speed, as long as there is oil getting to the bearings, even at low pressure, you are OK. In a high mileage engine the oil pressure is often low at idle simply because the oil pump is turning slowly and cannot maintain higher pressure between the larger than normal crankshaft and bearing clearances. As speed increases the pump turns faster and supplies more oil and the pressure should go higher. Low pressure as long as it is only at idle is not a problem. However at higher speeds the pressure should be in the normal range. Such a worn engine can benefit from higher viscosity (thicker) oil such as 20W-50 in above freezing weather and 10W-40 in winter. That will increase idle pressure and the thicker oil film maintains a better film between the worn parts

Apr 08, 2012 | 2002 Jeep Grand Cherokee

1 Answer

Oil filter seal keeps pop in out when I start the car 1999 Buick regal 6 cyl


The only time I've ever seen an oil filter gasket pop out on startup is when the gasket from the old filter had stuck on and the filter was thus installed with two gaskets. If that isn't the problem, It sounds like the oil pressure bypass valve is stuck and the pressure is building WAY too high. If you have an oil pressure guage, it would read very high.

Feb 15, 2011 | 1999 Buick Regal

1 Answer

2001 jeep cheokee limited, straight v6, 4.0 liter engnie - oil pressure is droping to 20 when stopping and rising to 40-50 when accelerating. No check engine light is coming on when this occurs. Any idea...


A low reading of 20psi is not dangerous. As an engine wears, clearances increase and allow some oil to escape out the sides of the bearings. Even at 15 psi you would still be OK.
There are several other causes for a low reading. Make sure the oil is not contaminated with fuel (smell the oil on the dipstick). If the oil has been in service too long, pressure can also drop...Oil has a VI rating (viscosity index). Especially in inexpensive oils this index is maintained by additive packages added to the oil base. Those additives break down from heat and shearing forces inside the engine.
If you are using any 5w oil (except synthetic) discontinue using it. Even in colder climates, most engines don't need anything that thin. Most synthetic oils are thinner than conventional lubricants and will give low readings...in that case, it's not a problem because they are so far superior that there is no sacrifice in protection.
As far as the difference between at idle pressure and at speed pressure, that is normal. Your oil pump is driven off the camshaft. As the engine rpm's increase the pump spins faster, giving you higher pressure as needed. When I build any engine, I always use a high pressure high volume pump. Even with those, idle pressure is lower than driving pressure and pressure always becomes slightly lower as the oil heats up.
So, the pressures you see are good, providing you hear no noises. Use a good quality oil 10w or 20w (better) as a first # and no less than 30 as the second number. If you want to add your own additive package, Use Lucas oil stabilizer or a small amount of marvel oil. Lucas will increase the VI number and marvel is a good cleaner as well as the fact that it seeks out hot spots where other oils run from them. Change your oil at 3,000 to 4,000 miles (depends on how hard you drive), Always use a good quality oil filter and you should not have a problem

Oct 26, 2010 | Jeep Cherokee Cars & Trucks

2 Answers

Low oil pressure after engine warms up in 94 blazer with 4.3


I have a 99 blazer and ever since I have owned it, it reads lower in pressure when idling, but will go up too 40 while driving. This is normal for the vehicle. If the pressure gets real low, and stays low, it means its time for an oil change.

As long as the pressure goes up when you give it gas, it is fine.

Jan 09, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

Engine knock...


Oil pressure might actually be a bit high for idle. High or low oil pressure in an older engine tends to be indicative of some serious issues. Oil pressure that is too high tends to be a clue that you have serious carbon build up. That aside, have you tried running a higher octane fuel, or perhaps adding an octane booster to your normal grade? Pinging can become knocking in a badly worn engine. One recommendation: At your next oil change try substituting a quart of marvel mystery oil or lucas engine oil treatment in place of one quart of your normal oil. Both have some pretty good track records for helping to free up sticking valves and break up carbon in older engines. I'm an old timer myself, and I personally swear by Marvel for older engines. There is no "rebuild in a can" but Marvel comes close. Give those a shot, let me know what happens.

Feb 06, 2009 | 1990 Ford Bronco

1 Answer

Engine knock when going uphill +...


Oil pressure might actually be a bit high for idle. High or low oil pressure in an older engine tends to be indicative of some serious issues. Oil pressure that is too high tends to be a clue that you have serious carbon build up. That aside, have you tried running a higher octane fuel, or perhaps adding an octane booster to your normal grade? Pinging can become knocking in a badly worn engine. One recommendation: At your next oil change try substituting a quart of marvel mystery oil or lucas engine oil treatment in place of one quart of your normal oil. Both have some pretty good track records for helping to free up sticking valves and break up carbon in older engines. I'm an old timer myself, and I personally swear by Marvel for older engines. There is no "rebuild in a can" but Marvel comes close. Give those a shot, let me know what happens.

Feb 06, 2009 | 1992 Buick LeSabre

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