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Ranger oil pressure

My oil pressure on my 1988 ford ranger v6 2.9L climbs slowly to the "H" at the top of my gauge. It began doing this recently. I have yet to replace anything. I will be replacing my sending unit and oil filter tomorrow. I am curious if that does not do the trick what else may be the culprit if these do not fix my issue. I'd appreciate any feedback and will post my results with each new part I try.

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There is a pressure release valve alongside the oil pump in the sump.
Ensure you use the correct grade of oil.

Posted on Aug 08, 2017

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Posted on Jan 02, 2017

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SOURCE: 01 grand cherokee fan relay/oil pressure

I don't know if this will help anyone, but i had a issue with my jeep running hot and check engine light coming on as well. After alot of trips to different shops - the last one found that there were two senors in the engine for the fan that need to be changed. Everyone would aways fine the one up top but not the second one. After that, have not had any other problems like it since.

Posted on Mar 23, 2009

  • 1 Answer

SOURCE: Location of oil pressure sending unit on 2003 GMC 4.3L

2 the right of dist. cap

Posted on Apr 07, 2009

  • 247 Answers

SOURCE: 02 cherokee losing oil pressure when accelerating, fine at idle.

Was the sending unit an aftermarket part?We like to install the original part back into most vehicle, but because of people price shopping, this can cause some issues. If the switch is working properly, the gauge should rise as the engine RPM's increase as you stated. With the key on and the engine off, disconnect the sending unit wire and ground it. The gauge should go to the highest reading, and that checks the wire, and the gauge. I suspect that the sending unit is failed or not the proper one for your vehicle.

Posted on Jan 07, 2010

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SOURCE: oil pressure gauge is reading 80 psi. I had the

The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.

Posted on Jul 20, 2010

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2 Answers

I have a 2003 ford ranger the oil pressure guage goes to hald way then 0 back to half way truck runs great with no problems


Check the plug first. Look at the tabs in the plugs. They should be touching from one side to the other. See a gap fix or replace the plug. If it looks good, Replace the oil sending unit.

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Factory gauges (especially Fords) are not known for being terribly accurate or reliable. As long as the gauge is pointed in the "normal" range, I wouldn't be too concerned.
If you want to pursue it, remove the oil pressure sending unit and perform an oil pressure test with a mechanical gauge. If the mechanical gauge fluctuates the same way, suspect a worn or failing oil pump. If the gauge is stable, I would suspect a faulty oil pressure sending unit.
If the truck has high miles, consider moving up to higher viscosity oil or adding an oil stabilizer. If could just be that the oil is breaking down when it's hot and the engine can hold consistent pressure with the thinning oil.

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1 Answer

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oil pressure sensor, low pressure due to dying pump. or blown gasket causing the pressure to leak out. Check the easy ones first like the sensor. Good luck

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First you need to hook up a manual gauge and see what the pressure really is.If the pressure is good [30 lbs or so] check the sending unit.If the pressure is bad and it is a 2.3 engine,they are well known for wearing out the cam bearings.Good Luck!

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Did you check oil pressure with a oil pressure gauge from the oil gallerys in the block. Determine if the oil pressure is adequate. Most likely its probably a bad gauge but if you used a oil pressure gauge and there readings inidictive of low source oil pressure then most likely you have a pump failure, or there is inadequate oil volume in your engine.

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1 Answer

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you need to try a external gauge to check the pressure to see if your dash gauge is right

if the engine took 10 minutes to get oil pressure it would be dead by now i would replace the oil pressure sender unit first

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3 Answers

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Possibly clearances "closing" at operating temparature? 20w50? Kinda heavy isn't it?Spun bearing - should make more noise than a "Tap"? I've heard several low and high mileage 2.9 engines "tap" but quits after warm up? That SEEMS to be somewhat common with the2.9 Sorry can't be more specific.

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