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Thread: oil sending unit
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01-29-2011, 09:39 AM #1
oil sending unit
ok so i just replaced the oil pressure sending unit on my car.. and the inside gauge still isnt showing any pressure.. could it just be a bad gauge? its been not registering pressure since in got it a month ago.. it has oil pressure or it would have seized up by now
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01-29-2011, 12:01 PM #2
How much fun was that to do?
It's either a defective OPSU, bad gauge, or there is a wiring issue. Do you have problems with any of your other gauges? What was it doing before you changed the OPSU, anything?
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01-29-2011, 12:02 PM #3
BTW -- going to move this to the General Help section.
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01-29-2011, 12:07 PM #4
actually it wasnt bad at all.. after reading some peoples comments on here about it was kinda affraid to try it.. but its actually very simple.. but since i got it the gauge has been showing maybe 4 lbs of pressure.. sometimes doesnt register at all.. and non of my other gauges are having an issue. they all work fine
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01-29-2011, 12:19 PM #5
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If you short both wires (+/-) to the OP gauge does it show max?
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01-29-2011, 12:23 PM #6
im not really mechanically inclined.. i do simple things.. like changing parts, belts, hoses.. i just took a chance on changing that sending unit.. i dont like working on stuff i cant see.. so i just changed them out. all i know is it still doesnt work even with a new one on..
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01-30-2011, 07:40 PM #7
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What Sarge is saying take a piece of wire and connect the two pins in the wiring harness that connects to the OPSU, have some one check the gauge while you do this. The Gauge should max out. If it does that means your wiring and gauge is working.
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01-30-2011, 07:48 PM #8
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When you replaced the switch, did you feel or hear a "click" when you connected the harness?
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01-31-2011, 02:38 AM #9
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01-31-2011, 03:15 AM #10
I know when I had to replace mine after it got broke off I had the same issue. I put a new sending unit on and then put everything back in place. When I started it up no pressure. I like you thought it might be a bad sending unit. I took it all apart again and took the sending unit back out. I then put it all back in to see if I just missed something. When I started it up it had pressure??? Maybe I missed something or just did have it exact. I was just happy it was working again.
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01-31-2011, 06:41 AM #11
there's also a couple other possibilities....wrong OPSU or a bad one out of the box. It would be nice to hook an analog gauge up just to verify you do have pressure but at 4 psi the motor wouldn't last long like you said so it's a fairly safe bet you have oil pressure. I'd still want to know for sure though if it were me. Double check the part number on the sending unit first to make sure you got the correct one.
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