# Oil Pressure mystery, '99 Cherokee

**URL:** <https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587>\
**Category:** Maintenance/Repairs\
**Tags:** cherokee, jeep\
**Created:** [January 22, 2012, 8:35pm UTC](https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587 "2012-01-22T20:35:08Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rafferty](https://avatars.discourse-cdn.com/v4/letter/r/87869e/32.png) [@Rafferty](https://community.cartalk.com/u/Rafferty)\
**Post date:** [January 22, 2012, 8:35pm UTC](https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587/1 "2012-01-22T20:35:08Z")

</div>

The Oil Gauge on the Instrument panel of my '99 Jeep Cherokee Classic is pegged fully to the right (TWICE the normal reading) when the vehicle is Stopped at a Light or stop sign. As I accelerate the needle drops down to NEARLY normal, but pegs again as I decelerate to a stop. The engine sounds nornal, operates like normal, no smells, oil level on dipstick is OK. What’s up with this?

---

<div class="post-metadata">

**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [January 22, 2012, 8:45pm UTC](https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587/2 "2012-01-22T20:45:00Z")

</div>

You might change the sending unit and hope for the best. It is the weakest and cheapest link in the chain on this symptom.

---

<div class="post-metadata">

**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\
**Post date:** [January 22, 2012, 9:56pm UTC](https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587/3 "2012-01-22T21:56:19Z")

</div>

Yup… You can also buy yourself an engine oil pressure gauge that you can hook to the port where that sending unit goes and do a manual check of the pressure and see what it is in REAL PSi…that way you will know if you have anything to worry about…not a hard procedure, no harder than replacing that sending unit really…buy a new sending unit…and an external Oil pressure gauge/tester and have at it

Blackbird

---

<div class="post-metadata">

**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [January 22, 2012, 10:43pm UTC](https://community.cartalk.com/t/oil-pressure-mystery-99-cherokee/70587/4 "2012-01-22T22:43:08Z")

</div>

I agree with the previous posters. It sure sounds like a weak/bad oil pressure sending unit.