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Oil presdure going crazy

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Old 04-01-2012, 03:50 PM
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Default Oil presdure going crazy

My oil pressure wound randomly drop, figured that my oil sending unit was bad but I replaced it and now it goes down and up..... What gives
Old 04-01-2012, 03:54 PM
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Does it drop to zero or around 15-20psi? I think the low specs for the gauge is 17psi
Old 04-01-2012, 04:31 PM
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Originally Posted by NattyBoh
Does it drop to zero or around 15-20psi? I think the low specs for the gauge is 17psi
Replaced the oil pressure sending unit and it's now at 0 all the time but the engine still sounds perfect....
Old 04-01-2012, 04:51 PM
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Originally Posted by larryftmfw
My oil pressure wound randomly drop, figured that my oil sending unit was bad but I replaced it and now it goes down and up..... What gives
If you add your Jeep data to your signature (nothing there) it will help others in diagnosing any problems you may have.

Cheers....
Old 04-01-2012, 05:07 PM
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Make sure the wire going to the sending unit isn't cut or shorting on the body. My gauge used to jump all around when it shorted on the body. Inspect the wire before anything
There's a good write somewhere too of how to clean out the sending unit area

It was something along the lines of unscrewing it, running a hose down from it into a catch pan. Turn on your jeep and push it to 4k rpm to clear out all the gunk and replace the sending unit
Old 04-01-2012, 05:10 PM
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I know I need to sorry, 2004 4.7 v8 wj overland
Old 04-01-2012, 05:12 PM
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Aaaand you're not even in the right section..... This is Cherokee tech XJ try the other section
Old 04-01-2012, 05:21 PM
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Originally Posted by NYsNumba1Man
Aaaand you're not even in the right section..... This is Cherokee tech XJ try the other section
My bad.... Ugh
Old 04-01-2012, 05:51 PM
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Anyway oil change fixed it
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