Question about 1993 Ford Ranger SuperCab

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My Oil Pressure gauge is working erratic, want to replace the sender, but where is it? V6 3.0 auto 2wd

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It's on the right(passenger) rear corner. It has one wire connected to it. To verify that you have the correct sending unit, if you disconnect the wire and start the engine, the oil pressure gauge will either stay at 0 or will peg out.

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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My 1992 toronado oil pressure is erratic would it be the oil pressure sensor or the gauge


first have the pressure test using a mechanical gauge to determine if there is a main bearing shell spinning
other than that it will be the oil pressure sender unit (1 wire attached )
do not confuse with the oil pressure sensor which connects to the ECM

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Good idea to check oil level first. Next, check that wire to oil pressure sender is still attached. Next, try hooking up know good mechnical gauge to insure you really have pressure. If all good, short wire to sender to ground--if gauge come up, replace sender.

Apr 14, 2015 | Cars & Trucks

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My 2001 Ford Ranger Edge oil pressure gauge has been jumping around all over the place. Took it in today and they said pump needs replacing... and that they had to remove the engine to do so at the tune of...


Your oil pressure gauge works with the oil pressure sensor, which is screwed into the block, to transmit a reading. A faulty oil pressure sensor can cause the reading on the gauge to be erratic. You may have a bad oil pressure sensor. You should also inspect the wires going to the sender to make sure they are not loose, corroded, or shorted. If a new sending unit doesn't work, you can check the oil pressure with a manual pressure gauge. Testing for oil pressure involves fitting the oil pressure gauge with an adapter. Then you will need to determine if you have a gauge problem or an actual oil pressure problem.

Oct 22, 2013 | Ford Cars & Trucks

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2005 Chevy Silverado show low/erratic (0-20 lbs) oil pressure.


More then likely the sending unit is faulty, but to be safe hook up a mechanical test gage at the oil pressure sender port and check oil pressure hot engine, if it is steady then replace the sending unit.

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My 1989 Ford Ranger 2.3L 2wd has a problem in the oil pressure area. The pressure gauge at idle says normal but when accelerating it goes past Low. I replaced the pressure sending unit and it didnt...


I would take the sender out and install a temporary manual gauge (we use a manual SW gauge connected to a 3' length of 1/4" high pressure hose). If the oil pressure is normal on the manual gauge then about the only thing left is the gauge itself.

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1 Answer

Check engine light came on and oil pressure gauge went to zero - oil check indicates that engine oil is full and last oil change was approximately 2600 miles ago.


If there are no tapping or knocking noises when the engine is running, chances are that either the wire on the pressure sending unit has fallen off or the sender itself has gone bad. If you are unsure about if you have pressure or not, you can attach an external test gauge to the engine right where the sender goes. If unsure, best not to run the engine or you can seriously damage it.

Jan 30, 2011 | 2007 Chevrolet Silverado 1500 2WD

1 Answer

2007 Chevy Silverado oil pressure gauge fluxuating, setting off computer on dash reading "engine oil low" also warning bell sounds. Thanks!


If you are lucky , replacing the oil pressure sender unit will solve the problem. Your truck might have perfectly good oil pressure , but a bad sensor. OR you might actually have low oil pressure , which is not good , and will be expensive to fix. Good luck.

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The oil pressure gauge on my '93 E150 just started going from below normal to normal pressure erratically. What is the most probable cause?


If there is an erratic movement like that, it would seem that your sender wire is loose or damaged, or your sender is bad. Normally pressure fluctuations will not be fast enough to produce the readings you describe.
These gauges are not really what can be called gauges anyway, as I found out in my 93 F250. They just take a reading at the sender, and if it is within a range anywhere within normal specs, which run something like 4LB to 80LB, the gauge will just stay in the middle of the normal range. What I heard was that there were too many customer complaints about the needle moving all the time, so they replaced it with one that would stay right in the middle which would be acceptable to most all drivers.

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Oil pressure gauge is erratic.


Should be close to area below/beside distributor when looking down.

Mar 29, 2009 | 1998 Jeep Cherokee

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