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  #133  
Old 03-22-2013, 11:10 PM
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Re: Can't get my wj outta 4lo?

Yes you can, a bit of oil can drip out, but not that much.
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  #134  
Old 03-24-2013, 01:31 PM
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Can I run the engine without the oil pressure sensor?
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  #135  
Old 03-24-2013, 01:49 PM
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Re: Can't get my wj outta 4lo?

The engine will run, but it will blow out all the engine oil via the open port of the pressure sensor. So not a good idea.
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  #136  
Old 03-24-2013, 03:02 PM
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Re: Can't get my wj outta 4lo?

Whoops, guess I won't try that . Any other way to see if its the gauge or the sensor?
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  #137  
Old 03-24-2013, 05:57 PM
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Re: Can't get my wj outta 4lo?

You can test the gauge doing the instrument self test: with ignition switch in OFF, push the odometer reset knob and while pushing, switch the ignition in run (no start). All the indicator lights come on, the odometer counts 00000, 11111 etc and the indicators go to full scale and back to normal indication. As soon as the test starts, you can release the odometer knob. You could eventually remove the connector of the oil pressure sending unit, but it will probably set a fault code, which has to be reset afterwards with a scanner.
But its almost every time the oil pressure sending unit which is faulty.
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  #138  
Old 03-24-2013, 06:43 PM
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Re: Can't get my wj outta 4lo?

So I tested it:

The oil pressure gauge went up with all the other gauges, went down with all the other gauges, then went back up.

The oil pressure sending unit is pricey as hell.
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  #139  
Old 03-24-2013, 07:20 PM
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$26 from rockauto.com

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  #140  
Old 03-24-2013, 07:37 PM
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Re: Can't get my wj outta 4lo?

So that should do it? How hard is the install?
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  #141  
Old 03-24-2013, 10:12 PM
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Re: Can't get my wj outta 4lo?

Not sure about the position on the 4.0, but in essence its just removing the connector, screw the old sensor out and the new one in. The new sensor already has sealing pasta on the threads, so that canīt go wrong.
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  #142  
Old 03-25-2013, 05:30 PM
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Is the grey thing the oil pressure sender unit?
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  #143  
Old 03-25-2013, 06:31 PM
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Re: Can't get my wj outta 4lo?

Quote:
Originally Posted by fin1211 View Post


Is the grey thing the oil pressure sender unit?
It looks quite different then the one i know for the 4.7, which is just screwed in. Maybe a member with the 4.0 can confirm.
But looking at the manual, this should be the camshaft position sensor, the grey one. The oil pressure sending unit is quite small.
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  #144  
Old 03-25-2013, 06:40 PM
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Re: Can't get my wj outta 4lo?

Googling showed me this:
Attached Images
File Type: jpg P1000904-1.jpg (112.0 KB, 8 views)
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