I changed the oil on my 01 v6 yesterday and now the oil pressure is really high. When cold it's running around 105 while driving and just over 90 at idle. After warming up it goes between 90 and 105 while driving and drops to just over 60 at idle but even gently pushing the gas pedal makes it jump back up quick. Before this it would run on average 60 while driving and looked like around 30-40 at idle. I'm using amsoil signature series 10w30 and amsoil EaO23 filter same as last oil change. Oil is right at the full mark on the dipstick. I did bump the pressure sensor while wiping off some of the road crud but I doubt it was hard enough to mess it up any, unless they just get fragile after 15 years.

 

sure sounds like the sensor is failing. check the wires to make sure its not grounding against anything or damaged.

 

60 to 70 would be normal sounds like malfunction .my gauges sometimes act up quirks of the car seems so far not big a issue with my 99 3800,see if other quages are acting up could be a ground like craby said too

 

Will check between raindrops. How much oil can I expect to lose if I have to replace the sensor?

I have encountered some gauge issues with the fuel gauge getting twitchy, I haven't noticed it since I blew the dust out of the connector when I had the cluster out.

 

no shouldnt lose much at all.

 

Be sure to fill up new sensor with oil before screwing into place.
Air is compressible.
Also, oil viscosity should be followed by the OIL fill cap and/or the Owner's Manual.
Generally, 5W30 is used and makes for a lighter oil and less pressure for the almighty MPG.

 

Never heard that one, nor have I seen that in installation instructions.
Curious, what do you do after the sensor is installed, and the oil drains back out of it once the engine is off?

 

No it does not drain out.
If the oil were attempting to drain, it would create a vacuum.
If no air can get into the sensor to equalize the vacuum void, the oil remains.
Ever unscrew a sensor and no oil come out?
If there is no oil, then the sensor is broke.

Physics - high pressure always tries to equalize a low pressure area/volume - if the high pressure can get to it.

 

You forgot to take into account gravity. Oil system always drain back to the pan. You can find all kind of primer kits for oil systems. Most of the kits are electric pumps that T into the oil system at the sending units. They have a switch you turn on, you wait the pressure builds then you start the engine and shut the pump off. these kits can extended the life of a motor.

I not never hear of filling a sensor, Considering many sensors are mount vertically it would be a neat trick to fill it on a lot of models.

 

I just tried this anti-gravity trick with a glass of water, let's just say the floor got washed off pretty well. Guess I should have tried using oil instead of water. I kid, but still. The sensor might hold the oil if upside down, but not if it's horizontal. I tested that way with a glass too, same result. lol