What would cause my oil pressure to go up and down?

Nicolas Lovell
35

Asked by Nicolas Oct 13, 2011 at 12:56 AM about the 1995 Jeep Grand Cherokee

Question type: Maintenance & Repair

When im stopped the pressure is low but when i driving the pressure is normal or just below normal. I have a 95 JGC with the 4.0 I6.

7 Answers

Matt Mankinen
1,925

It's normal for your oil pressure to be lower when stopped. Check your car specs for values. But typically the range would be 40-60. Also oil pressure sensor wear out with time, so either test it's volt or resistance values or install a new one.

Matt Mankinen
1,925

Sorry about that I was thinking of the V8. The I6 (on further review) should be at stop/curb idle: 13 psi minimum @1600 rpm & above: 37-75 psi. Higher or lower you would want to check your oil and coolant level. Being low on coolant (once engine warmed) will effect oil pressure. Form what I understand 89-90 I6 Cherokees at oil pump problems at 140-150k miles. Though you have a Grand so it wouldn't apply.

Nicolas Lovell
35

It does have almost 300k miles on it. Could the oil pump be going bad? It started doing it alittle over a month ago.

1 out of 1 people think this is helpful.
Matt Mankinen
1,925

Yes with that many miles, I would definitely replace the oil pump. Because if that goes out you'll have a seized engine in no time. If you want to take it a step further, replace your con-rod bearings and piston rings or just run a thicker rated oil.

Biggy Process
80

when i keep on the gas the oil pressure stays on 30 but when i come to a complete stop it drops to the 2nd white mark by the red line it stays there intell i get going again how do i stop that from happening

8 out of 8 people think this is helpful.
thejeepdoctor
4,205

are you using 10w30 oil? This is what ALL 4.0 engines should use.

2 out of 2 people think this is helpful.
llcjay
60

Driving home from work today my 2003 Cherokee Check Engine Light went on and the gauge is pointed on low exactly. I called my father and he started freaking out because he said my engine might blow, over heat. Is something wrong with my engine or is my gauge bad? Mine is not going up and down after i start it or am not driving. Mine is at the low gauge level at all times with check engine light. any kind of input would be awesome

6 out of 6 people think this is helpful.

Your Answer

Add photo

Related Questions

  • air conditioning stops working going up a hill but returns well going down hill...recharge it??? 6 answers

    Does my air conditioning need recharged? It works well until its put on a pull like going up a hill but returns to normal going straight or back down hill...Firestone is recommending a pressure test o...

    2001 Jeep Grand Cherokee

    -

    Maintenance & Repair

  • 1997 jeep Cherokee, stalling, oil pressure went from 40 to 0, been in shop 4 days, how do we fix it? 14 answers

    My daughter has a 1997 jeep Cherokee, 4.0, 2 wheel drive. she has just had it one week, on night two she was 2 miles from home and it started to choke on her, oil gauge went from 40 to 0, it died, t...

    1997 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • Jeep Cherokee started and ran for 1 minute then shut down. 3 answers

    Started the Cherokee up and it ran for a short while then shut down. Engine will turn over but it will not start. Vehicle has gas, no lights coming on at all.

    2003 Jeep Grand Cherokee

    -

    Maintenance & Repair

  • 2001 Jeep Grand Cherokee 17 answers

    I have a 2001 Jeep Grand Cherokee the check engine light came on as misfire cylinder 3 I fixed that replaced the coil pack and spark plugs the the check engine came on for 02 sensors I fixed those a...

    2001 Jeep Grand Cherokee Laredo 4WD

    -

    Maintenance & Repair

  • oil pressure 2 answers

    My wife and I bought a 1993 jeep Cherokee. We are on a fixed income and trying to find answers to problems I may be able to fix myself. When I crank the vehicle, the oil pressure will start at 40psi, ...

    1993 Jeep Cherokee 4 Dr Country SUV

    -

    Maintenance & Repair

Grand Cherokee
Looking for a Used Grand Cherokee in your area?
CarGurus has 59,493 nationwide Grand Cherokee listings starting at $1,200.
ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,140
#2 thejeepdoctor
thejeepdoctor
Reputation 1,080
#3 inuevafreak
inuevafreak
Reputation 1,010
View All

Related Models For Sale

Used Jeep Cherokee"
171 Great Deals out of 49,516 listings starting at $1,800
Used Jeep Wrangler"
352 Great Deals out of 42,092 listings starting at $1,800
Used Ford Explorer"
679 Great Deals out of 36,773 listings starting at $987
Used Toyota 4Runner"
260 Great Deals out of 11,910 listings starting at $1,992
Used Chevrolet Tahoe"
418 Great Deals out of 28,877 listings starting at $2,495
Used Ford F-150"
2,103 Great Deals out of 121,851 listings starting at $988
Used Ford Mustang"
744 Great Deals out of 31,402 listings starting at $1,800

Used Cars For Sale

2015 Jeep Grand Cherokee For Sale
40 Great Deals out of 36,966 listings starting at $25,991
2014 Jeep Grand Cherokee For Sale
231 Great Deals out of 5,018 listings starting at $18,501
2013 Jeep Grand Cherokee For Sale
63 Great Deals out of 1,952 listings starting at $17,977
2012 Jeep Grand Cherokee For Sale
120 Great Deals out of 3,565 listings starting at $15,999
2011 Jeep Grand Cherokee For Sale
64 Great Deals out of 2,314 listings starting at $12,973