Does a 1999 Ford Explorer have a mechanical or electric oil pressure gauge?
The oil pressure gauge in a 1999 Ford Explorer is ELECTRIC
Pressure Indicator is any instrument that indicates pressure. Pressure Gauge is also a type of pressure Indicator. It is a mechanical device. Pressure indicators can work on mechanical deflection (in case of pressure gauge) or Piezo electric effect, change in capacitance, change in inductance etc. These are generally digital type instruments.
You will need to remove your oil pressure sending unit and install a mechanical gauge to get a true reading. You need to start out cold and write down the pressure reading and also once it warms up to operating temperature. If the pressure gauge is not the same as the mechanical one you have a bad pressure switch.
Why is oil pressure on 1999 corvette reading 90 psi on the gauge and 128 on the oil pressure digital gauge?
first test pressure with a professional test kit a mechanical one let engine reach operating temp. this will be you true pressure, sometime the electric oil pressure sending unit is not compatible with your gauge and give a inaccurate reading.your pressure is way to high,did you put a high pressure race pump in? if not you have a bad pressure regulator valve in your pump 60 psi is plenty to much will start blowing oil…