Oil Pressure sending unit - JeepForum.com
 
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post #1 of 8 Old 09-04-2008, 03:48 PM Thread Starter
boaty1
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Oil Pressure sending unit

I replaced my oil sending unit a few months ago and now I think it might be going out again.* Is this normal that they can go out so fast.* Connection seems to be ok.* It jumps around and pegs alot.* Is this the problem???* Thanks guys.


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post #2 of 8 Old 09-04-2008, 03:57 PM
Mean Max
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A short to ground somewhere in the wire from the sending unit can cause this. Check the wire for someplace that may be shorting out on the frame or engine.

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post #3 of 8 Old 09-06-2008, 08:46 AM
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I agree. CHeck for a short somewhere.
On a related note, do you have to drain the oil to change the sending unit? If you change it out with oil in the motor will oil run out all over the place? Thanks!
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post #4 of 8 Old 09-06-2008, 09:02 AM
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Mine just screwed in with oil in the engine. As long as the engine's not running, there's no pressure and it won't push oil out. Put on a little thread tape to make it seal tight and you're fine.

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post #5 of 8 Old 09-06-2008, 05:09 PM
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Troubleshoot Oil pressure sending unit

I have AMC360, I've located my oil pressure sending unit (Im pretty sure thats it) one post terminal, how can I test it to see if its sending info to the guage? my guage does NOT work at all, so i dontknow if its the sending unit or the guage... and I want to troubleshoot it

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post #6 of 8 Old 09-08-2008, 12:52 AM
Bubba Ray
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Try a mech. test gauge kit from someplace like Harbor Freight. Got mine for about 20 bucks.
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post #7 of 8 Old 09-08-2008, 03:21 PM
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Quote:
Originally Posted by J33P'r View Post
I have AMC360, I've located my oil pressure sending unit (Im pretty sure thats it) one post terminal, how can I test it to see if its sending info to the guage? my guage does NOT work at all, so i dontknow if its the sending unit or the guage... and I want to troubleshoot it
Most all single wire senders (whether oil, temp, fuel, etc.) have 12V applied to the gauge, and the ground is provided through the sensor's single wire. When a complete ground (meaning good ground with no resistance value) is applied to the single wire from the sensor, the guage "pegs" out with it's highest reading. So, if you supply the sensor wire with a solid ground and your gauge reads it's highest reading, you can be reasonably sure that the gauge is working, and that the wiring is okay.

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No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

There is no situation that cannot be improved with a small but well-placed explosive.
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post #8 of 8 Old 09-08-2008, 05:15 PM
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i put a sunpro mechanical gage in mine for $15 (put it where the clock goes as neither worked)...easy install, looks almost factory and it works like you'd expect it to..very responsive



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