Originally Posted by justinkeoughan
Brand new sensor 3 weeks ago. Still the same thing. A fella would know if there was no oil pressure because you would her the lifters ticking and slapping like crazy. So I'm going to assume the sending unit is still ok. Basically what I want to do is install a gauge showing me actual oil pressure for piece of mind if the light keeps coming on and off. I heard that the sensor is a N/C contact switch and if the pressure drops below 8 psi the contact opens thus causing the light to come on.
Exactly right. Most Ranger gauges (water temp and oil gauge) are essentially idiot lights. And on your 05, you have plenty of idiot lights. If the oil pressure sensor (or switch) was replaced last week and the light is STILL coming on, there's an issue somewhere. The sensor swap is the 1st cheap thing to do, to try to correct the issue.
The 3.0L has a cam synchro issue, not too sure if it's similar on the 4.0L's.