Question about 1988 Ford F 350

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No oil pressure when warmed up

No oil pressure when warmed up when idling hope its gauge

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Check the oil pressure sending unit on the side of the block. depending on the milaage on it, its probably defective

Posted on Jul 21, 2009

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No ticking in upper engine area? Have mechanic, or shop hook up a mechanical gauge to verify.

Posted on Jul 21, 2009

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1 Answer

2001 tundra low oil pressure at idel engine warms up what does line on gauge repersent in lb how to fix or is it normal 90,000 miles obit always did since m


Well according to the owners manual, anything from low up to the last mark is normal. I think they mean anything from the low mark up half way is normal for idle.
If the gauge stays near L at idle and while driving, you could have low oil pressure or a gauge problem. A mechanic would check pressure with a mechanical gauge.
Normal for most engines is around 25-40 psi at idle and 30-60 psi when driving.

Oct 17, 2014 | 2001 Toyota Tundra

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99 AU2 Fairmont Giha oil pressure drops at idle more so when dash light on,hi beam and heated rear window w/l on


Hook up a test gage to the oil pressure switch pressure port and verify the oil pressure is good (about 20 PSI at idle hot engine) if it is ok replace the oil pressure sending unit.

May 11, 2017 | Ford Taurus Cars & Trucks

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Oil light on after engine warm-up on idle


this means a mechanical gauge test is required to check actual pressure warm idling if low below 20 psi then the oil pressure pump relief is stuck open or engine bearing are worn

May 15, 2014 | 2005 Opel Astra 1.4

1 Answer

Oil pump at idle is good when car is warming up, but after it get real warm after 20 miles of driving the idle oil presure is low about 15 lbs



  • This is normal. On your car, on a cold start the pressure will be around 75 PSI. After the engine warms an oil pressure of 15-20 PSI at idle is just what it should be. The oil pressure gauge should escalate when accelerating up a bit to. If your old school like me 15 PSI mean danger but tat Caddy is just fine.

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Oct 12, 2011 | 2000 Cadillac Catera

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I keep losing oil pressure when im at an idle but when i acc. the pressure comes back up and i have checked the oil it is fine


What is the make/model of the Jeep? What engine? Are you losing pressure completely or is it just low at idle? Many older Jeeps show little oil pressure at idle when the engine is warm. If you aren't hearing rattling like you are actually losing oil pressure, and the pressure comes up when you accelerate, you are probably OK.

Jul 30, 2011 | Jeep Wrangler Cars & Trucks

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When stopped at lights oil light flashes.. My oil level is fine. What could it be?


this is a common sign of a bad oil pressure sender, but could also be caused by low oil pressure, a sender is cheap,but it"s always smart to do a pressure test first with a mechanical gauge,you can obtain a mechanical gauge from most automotive parts stores. then you"ll have to locate and remove the oil pressure sender and install the gauge you bought. make your test at warm idle you should have at least 25 psi below that you may very possible have worn engine bearings making it impossible for the engine to have any better oil pressure at idle. if you have 25 or greater psi of pressure at idle replace your oil sender and you"ll be back on the road

Dec 30, 2010 | Ford Taurus Cars & Trucks

1 Answer

OIL LIGHT GOES OUT AT 1000RPM OTHER WISE ITS ON 1 CHANGED OIL TWICE 2 RPL OIL SENDING UNIT 3 PERFORMED MOTOR FLUSH


I think you should have an accurate mechanical oil pressure test gauge installed in place of the oil sending unit and check to see what the actual oil pressure is. If it's 15 psi or so at an idle and about 35 psi or higher at 2500 rpm then your pressure is good and means you have some sort of issue between the sending unit and gauge. If the pressure is low, say below 10 or 5 psi at an idle with a warm engine and doesn't improve much at higher speeds then you actually do have low oil pressure, most likely due to worn bearings inside the engine. An accurate test gauge should tell the tale and help you figure out what is wrong. Hope this helps out a bit!

Jul 14, 2010 | 1992 Lexus Ls 400

1 Answer

Truck has low oil pressure at idle no knocks just low pressure


The gauges on some of these weren't overly accurate so I would suggest having someone test the oil pressure with a mechanical test gauge temporarily installed in place of the oil pressure sending unit to see what the actual pressure really is with the engine fully warmed up at an idle [this is when the pressure would be at it's lowest point] If you have 15 psi or above then that's about normal. If you have less than 10 psi then that's getting fairly low and could be the result of worn internal bearings. If you have good oil pressure but your gauge reads very low then you might just have an inaccurate or faulty sending unit that isn't reporting the right pressure reading to the gauge. Once you have the actual pressure tested you'll know where to look next.

Jun 26, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Oil light flickers or comes on at idle in park when engine is warmed up


Your engine oil pressure is low. Things that can cause this, are: Worn engine, oil viscosity too thin, oil pump failing, clogged pickup tube screen, filter clogged, or the pesky little oil pressure sensor is going bad. You'll need to hook up a manual oil pressure gauge to where the sensor screws in, and see what you're actually getting for oil pressure, and then decide from there as to what troubleshooting action to take. Hope this helps.

Nov 26, 2009 | 2002 Dodge Stratus

1 Answer

89 C4 911 gauges reading incorrectly?


These cars are funky and this is normal...gauges on all of the earlier cars are for general reference...checking the oil level manually while the car is running and warmed up is the most proper way to do this...generally speaking, your pressure should drop as the car warms up, but still reach 5 bar on full accelleration (928's have the same gauge). The oil level gauge will actually increase as the car warms up...the difference can be dramatic.

Aug 25, 2009 | 1989 Porsche 911 Turbo

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