Keirstin23

Well I had to replace a blown hose and my thermostat. But I am having problems with my oil pressure dropping at idle after its warmed up. I had a similar problem before but it dropped the whole way to 0. Now it is dropping to 20 or so. It still has a little bit of a rough idle. And I replaced the oil pressure sending unit a little over a year ago. Is it possible that it has went bad already? Really not sure about this problem but I am concerned. Help would be appreciated! Thanks.

tjwalker

Where did you purchase your oil pressure sending unit? No lack of issues with some (not all) aftermarket sending units.

You could either (a) verify your exact oil pressure with a mechanical gauge which can be rented by many big box parts stores or (b) replace your sending unit and hope that resolves it. This time, buy it directly from Jeep for the best reliability and longevity. Well worth the extra money.

Oil pressure spec for the 4.0 is as follows:

*Not less than 13 psi at HOT idle
*Between 37-75 psi over 1600 rpms

Keirstin23

I got the sending unit at advance auto. I will try manually checking the pressure. The part that concerns me is it idles a little bit rough and stutters a little bit when I accelerate. But once I am going it seems to run great.