OIL Pressure

[DannozISB]

Got a good one:

Before starting the engine (anytime), the pressure sensor will indicate 40psi, in the ON position -not running. Occasionally, it will drift to high-normal and ease back down. This is an '01 2500 2WD with 102K. It is a 24v ISB with auto-trans. This does not change when the enginer is running. I can only keep an ear out for low pressure. :WHT: :WHT:

My question is...has anybody experienced this anomoly AND where is the oil-sending unit located.

I have heard that these senders come in a few variations, such as:
2-pin
3-pin
Idiot sendor that simply transmits the presence of oil pressure, which the guage will translate into a mid-range deflection.
An actual real-pressure sending unit that transmits actual pressure algorythems to the guage.

Any info, paticularly the sender location would be helpful. :help: :help:

[Clunk]

Here's some info, just scroll down to the picture.


http://www.dodgeram.org/tech/dsl/mt_2_feb98/fuel_sys_comp.htm

[DannozISB]

Thanks, I'll take a peek at that. Dodge quoted me $270 for a new sending unit. I think I'll check into the cost at our local Cummins service center, should it require replacement.

[Clunk]

You might be sure the hole is clear in the block then spray some carb cleaner in the hole of the old sensor then blow out with air....it might return to zero.