Question about 1994 Toyota 4Runner

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My oil temp light goes on frequently, but mainly on high acceleration or when engines cold . Not all the time though What could be the cause of this?

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The temp sensor is faulty or a poor connection in that circuit!

Posted on Oct 08, 2010

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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

Why are so many trouble diagnostic codes being thrown


sounds like you speed sensor and your throttle poistion sensor

Sep 02, 2014 | Cars & Trucks

1 Answer

Nissan problems


1. Transmission fluid level
2. Engine idling rpm
3. Accelerator pedal position (APP) sensor
4. Line pressure test AT-66, "Line Pressure Test"
5. Line pressure solenoid valve
6. Control valve assembly
7. Transmission control cable, if any.
8. Short circuit in wiring harness.

Feb 23, 2014 | Cars & Trucks

1 Answer

Since day one, my 2007 Dodge Ram Hemi always starts like its in a cold engine cycle. In other words, it starts at a high rpm and steps down in increments for about 20 seconds. Hot, cold no matter. It...


Yes, it is normal for a vehicles idle to be high when first starting up, no mater what the temp. If it`s already warmed up to operating temp, it will still have a high idle for a brief moment when starting. Usually this is the IAT (Intake Air Temperature) sensor. Located in the air duct down from the air filter, and before the throttle body.

Main proplems from IAT sensors are to low of an idle at normal temp, or the idle never comes down after warm up.

Your gas milage problems would stem from Oxygen sensors, plugs, wires, timing, etc...

Here is a quick test, just incase your OBD II (Computer, PCM..) memory module is not working properly. With the engine running, using the tips of your fingers, tap on the PCM, if the engine stumbles or stalls and sends troubles codes that light up your check engine light while tapping, if it does, check to make sure all wires are securely attached to it.

Apr 19, 2011 | 2007 Dodge Ram 1500 Quad Cab Sport

1 Answer

2000 Ford F-150. The oil temp warning light came on and the oil pressure gauge dropped to zero. While accelerating, the pressure gauge goes back to normal and the warning light goes out. No drivability...


Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!

Jun 06, 2010 | 2000 Ford F150 Flareside SuperCab

2 Answers

Have tapping noise in oil pan area of 2004 5.3l chev silverado owned since new. noise started suddenly. Seems to quieten down some after warmed up. Speeds up with RPM's... opinion on what cause is ? -...


Sounds like a worn big end bearing. Not a disaster as you have caught it early. Drain engine of oil and remove pan. Remove spark plugs and disconnect battery. Undo big ends, fit new bearings, refit the big ends and tighten to specified torque. Might be an idea to also replace main bearings as a preventative measure whilst everything is open. The main journals on the crank are probably fine. Check the journal facings of the removed bearings and determine not only how much wear but the wear type. I would try using 5-40 (or 5 -50) fully synthetic multigrade oil but not change it so frequently (15K is plenty). These oils are thin when cold and help avoid high shear forces within the bearings at cold temperatures whilst keeping a good viscosity at high running temperatures - good for the more mature engine. Because they are fully synthetic they keep their properties for a very long time. Good luck

May 01, 2010 | 2004 Chevrolet Silverado

1 Answer

Oil pressure high when engine cold. but fine when engine is warm


It is normal for oil pressure to be higher when the oil is cold. As the oil heats up, it will thin out. Since your oil pump is driven faster with the acceleration of the engine, your pressure will also increase. On a engine up to full temp, your oil pressure will probably be around 20 psi and maybe up to 60 at full load. But on a cold engine, you may see 60 psi at idle. I dont know if your high oil pressure is causing your vehicle to stall, but maybe your running the wrong weight/type of oil for your truck. If you live in a extreme cold area, you may want to look into a block heater to help warm up your engine faster.

Mar 14, 2009 | 2001 Chevrolet S-10

2 Answers

Why is my oil tempriture showin that its cold most of time even though car has been runnin 4 hours on my focus st170


you dont have an oil temp guage,,,,its for your oil level you may want to have you oil checked.to make sure you have the right amount in it

Oct 26, 2008 | 2003 Ford Focus

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