Minuit Posted April 20, 2015 Share Posted April 20, 2015 Quick question: does anyone know what oil pressure level the idiot light turns on and off at? '91 4.0 with the basic idiot light cluster. Link to comment Share on other sites More sharing options...
jimoshel Posted April 20, 2015 Share Posted April 20, 2015 Around 5-7 lbs PSI. This is for the factory original. There are after market market units available that turns on at 20 PSI. There are also some after market units that are adjustable. Link to comment Share on other sites More sharing options...
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