oil pressure gauge is fluttering up and down

Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
hello,my oil pressure gauge is fluttering up and down,it goes below 40 when idling,then goes up when driving,what could cause this?is this natural (common).or could it be my oil pump going bad?THANK YOU!

My oil gauge goes down below 40 when idling,then goes up when driving,is this natural,or is my oil pump going bad?
Feb 23, 2012 at 3:43 PM
Advertisement
Avatar
BILLYMAC
  • ✓Experienced Mechanic
  • 2,204 POSTS
Hi well kind of normal for this car you can replace the oil sending unit may straighten up.you can have the pressure tested with a manual guage to see exactly what it is. But honestly if not ticking and not below 30 psi prob not really a problem. good luck
Feb 23, 2012 at 4:36 PM
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
where is the oil sending unit located,so i can replace it,if have to.i'll try that,if doesn't straighten out,i'll try a pressure test.
Feb 23, 2012 at 5:09 PM
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
can you send a picture of the oil sending unit?thank you!
Feb 23, 2012 at 5:14 PM
Avatar
BILLYMAC
  • ✓Experienced Mechanic
  • 2,204 POSTS
here you go
Feb 23, 2012 at 5:40 PM
Avatar
CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
can you show me or let me know where this oil sending unit is so i can replace it?p.s. the engine is not making a ticking or a knocking noise,just thought i let you know.thank you!
Feb 24, 2012 at 3:08 AM
Avatar
CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
WHAT ENGINE YOU GOT?

IS THERE ANY MORE SPECIFICS AS TO YOUR GRAND CHEROKEE'S NOMENCLATURE (LIMITED, LARADO, ETC)?

I MAY BE ABLE TO GET YOU A DIAGRAM

THE MEDIC
Feb 24, 2012 at 6:04 AM
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
it's a 1996 grand cherokee laredo,5.2 engine.
Feb 24, 2012 at 6:24 AM
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
can you show me or let me know where the oil sending unit is located,for a 1996 jeep grand cherokee laredo,i want to replace it,if this is causing my oil pressure gauge flutterating,thank you!
Feb 24, 2012 at 11:54 AM
Avatar
TOPGUN
  • MEMBER
  • 11 POSTS
the engine is a 5.2L
Feb 24, 2012 at 11:56 AM
Avatar
CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
I LOOKED AT ALL AVAILABLE DIAGRAMS--IT IS NOT SHOWN

I LOOKED UP "SENDING UNITS", ON THE CHART, IT SAYS THAT THE OIL PRESSURE SENDER IS "NEAR THE DISTRIBUTOR"

SO YOU MIGHT GAZE AT THE PIC OF WHAT THE PART LOOKS LIKE, AND SEARCH ALL AROUND THE DISTRIBUTOR.

THE MEDIC
Feb 24, 2012 at 6:09 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle