oil pressure gauge not working properly

Hi,

This could be a couple of different things such as a bad sensor or even the instrument cluster.

Let's try a couple of things. First, locate the oil pressure sending unit on the back side of the engine behind the intake manifold. See pic 1 for location. Disconnect the sensor and see how the gauge reacts.

If there is no change, I need you to check pin 1 in the harness connector for continuity to ground. Also, pin 2 in the same connector should provide a 5v reference signal with the key on. Check that as well. See picture 2 below for pin orientation.

Here is a link you may find helpful when testing the wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.