Low oil pressure? - Ford Powerstroke Diesel Forum
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Old 02-03-2013, 12:42 PM
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Low oil pressure?

Hello i have a 1994 1/2 F-250 with the 7.3 Powerstroke diesel, within the last week i've notice that the oil pressure guage isn't running at the normal spot around the "M,A" in normal. It's now running at the "N,O" area. I'm at a loss check oil levels all good, no oil usage, no use of any other fluids. The truck has 176,000 on it. Just would like to know where to start to fix the problem. all this started after 2 weeks of subzero temps, had no problems during those weeks, so i'm confused any help would be greatly appreciated.
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Old 02-03-2013, 01:20 PM
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I'd suggest replacing the sending unit ,It's basically an idiot lamp /gauge .
I went through this with temp gauge and a few bucks later I had a reading one could trust
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Old 02-04-2013, 06:37 PM
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Got the new oil pressure sending unit and all is well.
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Old 02-05-2013, 11:20 AM
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Just for info: The factory gauge is really just a glorified idiot light. A real oil pressure gauge would have a sending unit where the resistance varies with the oil pressure it senses. Ours have only a switch (either ON or OFF). When the oil pressure is above the threshold (something like 6 psi), the gauge is supposed to read mid scale. There is a mod you can do to make it more of a real gauge (and I've done it), but it really isn't that effective (you can't find a sending unit that matches the factory gauge very well). Cheers!
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