2004 4.7 oil sending unit
#12
Join Date: Dec 2006
Location: Wheatley Ontario, Canada.
Posts: 295
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If you REALLY want to know what is going on inside and what the conditions are then connect a mechanical gauge to the engine and see exactly what PSI you are and how long it takes to build pressure. Then you will know if you have an oil pump issue or a oil pressure sending unit issue