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  #1  
Old 10-09-2013, 09:24 PM
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Is my oil pump..

Is my oil pump going bad or is it the sensor?

2000 Mercury Mountaineer (Ford Explorer)
302
Auto

Yesterday the oil pressure needle started going crazy and the dash light came on we stopped at the nearest gas station and turned the car off. Waited about 15 min. Started it back up and everything was fine, checked the oil added added some drove all day, everything fine and then it started acting up again. Any thoughts?

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  #2  
Old 10-09-2013, 09:35 PM
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Light it on fire and start filming.
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  #3  
Old 10-09-2013, 09:38 PM
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Quote:
Originally Posted by ramonajim View Post
Light it on fire and start filming.
It's the only car I have and it only has liability on it.
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  #4  
Old 10-09-2013, 10:24 PM
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Probably just an instrument cluster issue. Is the engine making any unusual noises when you see it happen?
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Old 10-09-2013, 11:35 PM
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Quote:
Originally Posted by The Clk Man View Post
It's the only car I have and it only has liability on it.
Oh, well then you should definitely change the policy first.
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  #6  
Old 10-09-2013, 11:42 PM
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Originally Posted by engatwork View Post
Probably just an instrument cluster issue. Is the engine making any unusual noises when you see it happen?
The needle on the oil pressure gage goes crazy and then flat lines and then the check gages light comes on. then when I press the gas pedal, the harder I press, the higher the needle goes and the everything is normal.
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Old 10-09-2013, 11:54 PM
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My money's on a cluster issue, then -- it's hard to picture the oil pressure jumping around like that.
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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  #8  
Old 10-10-2013, 12:21 AM
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I'd clean the connection on the sensor first....and look for a loose wire.
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Old 10-10-2013, 11:23 PM
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Now that I think about it, the F-150 I use to own would do the same thing when it would get around freezing outside.
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  #10  
Old 10-12-2013, 09:07 PM
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An oil pressure sending unit for that rig is $20. Change it, and go from there. We stock several. Just do it. OEM motocraft one is $20, an aftermarket one is $12.

Make sure to specify that it has a gauge, not just a light, they are different.

~Nate
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  #11  
Old 10-12-2013, 09:14 PM
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I thought that Found on Road Deads had a fake gauge that read 3/4 scale when there was pressure and zero with no pressure, with the sender being an oil pressure light switch.
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  #12  
Old 10-13-2013, 12:49 AM
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Quote:
Originally Posted by spdrun View Post
I thought that Found on Road Deads had a fake gauge that read 3/4 scale when there was pressure and zero with no pressure, with the sender being an oil pressure light switch.
If that's the case, I'm betting on the gauge itself...
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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  #13  
Old 10-13-2013, 04:53 AM
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Quote:
Originally Posted by spdrun View Post
I thought that Found on Road Deads had a fake gauge that read 3/4 scale when there was pressure and zero with no pressure, with the sender being an oil pressure light switch.
IIRC, it is 3-5 psi that will make it read a little over half. That kinda makes me wonder. Is the pressure fluctuating and low? I would hook a mechanical gauge up to it to see what it is doing. After that, chase grounds.

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