1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

oil pressure

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Old 08-23-2011, 07:41 AM
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ok when i am driving a steady speed down the highway my oil pressure fluctuates a lot. oil level is good and no unusual noises. could it be the sending unit or what else could i check. im scared to death to drive it and its my only vehical for now. Had to borrow my sisters car today
 
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Old 08-23-2011, 10:15 PM
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I would hook up a manual guage and see what it is then.
 
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Old 08-24-2011, 06:49 AM
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Im going to tonight. Do you know where there is a port I can hook into. I want to be able to watch my factory gauge
 
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Old 08-24-2011, 11:06 AM
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Get a spliter and hook up both of them in the same spot.
 
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Old 08-24-2011, 02:19 PM
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Default oil pressure

Or use the 1/8 npt port in the top of the filter head


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Old 08-24-2011, 03:05 PM
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Alright thanks alot. I really hope is the sending unit
 
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Old 08-29-2011, 05:41 AM
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Definitely losing oil pressure. Anyone know where I can send off an oil sample
 
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