Btommy

So, up here in MN it is a balmy 20 deg. and when I start my jeep it starts and runs just fine no noise or anything but my oil pressure jumps to 80 psi.
once the engine is warm if I turn it off, and restart it the pressure goes back to normal 30-50 psi. any thougths? should I be concerned? I called the dealership and they said if it sounds like it is running good don't worry that it is just a dummy gauge? 140 bucks installed (some sensor)

Btommy

Really no one has any thoughts or suggestions on this?

DeadCellM60

As long as it runs fine and you know oil is circulating I wouldn't worry too much about it. Like they said, the Oil Pressure Sending Unit is probably just going south.

But $140 installed? I guess they don't call them "stealerships" for nothing! The part is like $20 at Advance and takes 2 minutes to put on.

RTorrez1

Check your oil pressure sending unit it may be plugged.

tjwalker

I agree that high oil pressure readings are generally not real and most of the time are related to a faulty oil pressure sending unit. Failure of this sending unit is very common.

I suggest you skip having them install it and do it yourself. 15 minute job. BUT I would buy it from Jeep, as aftermarket oil pressure sending units are not always a good bet for reliability and especially longevity. Well worth a few extra bucks for a Mopar part here.

1991Jeep_Man

x2 I cheaped out and bought an AutoZone unit... big mistake. I have random fluctuations and what not. Get the dealer part. Or I've also heard NAPA has good replacement switches.

Btommy

will do, thanks for the input

mech1ohio

just had the same problem... replaced the sending unit and has dropping to 10 psi so i replaced the pump all in all cost me 5 hrs. and $200.......now psi is 60 at 2000 rpm and 40 at idle

jeepXreaper

What do u suggest doing if the psi is always at 40 at idle n then 60 while driving is this good?

RTorrez1

That's about normal. Personally I wouldn't mess with it.

tjwalker

Replace the oil pressure sending unit. It is not likely that you are actually at 40 psi at HOT idle. Buy it from Jeep.