Weird oil pressure??? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 12-10-2011
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Weird oil pressure???

I have a 1999 Ranger xlt 3L, everything runs well...lately though I've been noticing that my oil pressure gauge looks lower than normal, the needle isn't dead center. Do u think there's something wrong or the gauge being weird.
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Old 12-10-2011
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I wouldnt worry. The sender could just be old and starting to act weird. If you are that worried plumb in a mechanical gauge just to check it. But those gauges are wildly inaccurate. More of a glorified idiot light really
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Old 12-10-2011
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The gauges are set to read about midway when there is about 7psi oil pressure or more.
If the gauge is reading different from what it used to , either the gauge is going weak or check the system voltage to be sure the alternator/battery is keeping up.
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Old 12-10-2011
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I just drove it and noticed at idle it flickers a little bed... I'm thinking bad sending unit ...should I change it?
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Old 12-10-2011
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Is the sender a pressure transducer, or just a pressure switch?
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Old 12-10-2011
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Quote:
Originally Posted by woo View Post
Is the sender a pressure transducer, or just a pressure switch?
It is a switch that actuates at about 7 psi.
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Old 12-10-2011
woo woo is offline
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Quote:
Originally Posted by OTRtech View Post
It is a switch that actuates at about 7 psi.
Thanks.

So the needle sits at a fixed position if there's 7 psi or above?

In later years I think the computer generated a dance for the needle that simulated real oil pressure. Very misleading.

And in my 2011 there is no OPG at all.
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Old 12-10-2011
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So do you guys think its the sending unit?
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Old 12-10-2011
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No

The gauge isn't real anyway.
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