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-   -   Jumpy/high oil pressure (http://www.wranglerforum.com/f19/jumpy-high-oil-pressure-150814.html)

AV8R 04-02-2012 07:40 PM

Jumpy/high oil pressure
 
On my 1995 2.5L YJ I've noticed the past few days that the oil pressure jumps from just over 40 to 80 when I'm cruising and then press the clutch or take it out of gear (sudden RPM decrease).

Sort of like in this video I made yesterday while driving to work: Jumpy oil pressure 1995 YJ 2.5L - YouTube

It has also been running higher than usual at 60 or just over. When I come to a stop it sits just under 40 at idle. Here's where it's running at about 2500 RPM while cruising down the road: http://i.minus.com/iwTfj4cYF7lqF.jpg

Is this normal? I don't remember it running this high before, but I've only had it 3 weeks so I can't say really how it has been running all along.

AV8R 04-04-2012 12:56 PM

Bump?

Quote:

Originally Posted by AV8R (Post 2211898)
On my 1995 2.5L YJ I've noticed the past few days that the oil pressure jumps from just over 40 to 80 when I'm cruising and then press the clutch or take it out of gear (sudden RPM decrease).

Sort of like in this video I made yesterday while driving to work: Jumpy oil pressure 1995 YJ 2.5L - YouTube

It has also been running higher than usual at 60 or just over. When I come to a stop it sits just under 40 at idle. Here's where it's running at about 2500 RPM while cruising down the road: http://i.minus.com/iwTfj4cYF7lqF.jpg

Is this normal? I don't remember it running this high before, but I've only had it 3 weeks so I can't say really how it has been running all along.


Baby Huey 04-05-2012 04:20 PM

Quote:

Originally Posted by AV8R (Post 2218882)
Bump?

You could do two things....
1) Remove your oil Pressure sending unit and install a real oil pressure gauge ,(Any Auto Parts Store or WallMart...)

2) Buy a new oil pressure sending unit and see if that makes a difference..

Wrangler YJ Oil Pressure Senders

Do you know what type and weight Motor oil the PO installed before you bought the Jeep ? :confused:

Good Luck !! :popcorn: "BH"

blackforestgreen 04-05-2012 11:17 PM

i am am sure you checked to see if it was over filled. is the oil pressure increasing as you accelerate and dropping pressure when there is less of a "load" on the engine?

AV8R 04-06-2012 11:08 AM

Quote:

Originally Posted by Baby Huey (Post 2223799)
You could do two things....
1) Remove your oil Pressure sending unit and install a real oil pressure gauge ,(Any Auto Parts Store or WallMart...)

2) Buy a new oil pressure sending unit and see if that makes a difference..

Wrangler YJ Oil Pressure Senders

Do you know what type and weight Motor oil the PO installed before you bought the Jeep ? :confused:

Good Luck !! :popcorn: "BH"

I don't know what the PO used before, but I changed all fluids when I bought it... I used 10w30. It is not over filled. Also, this just started happening recently, a good 2 weeks after I changed the oil.

I've read that the oil pump has springs and such to deal with different RPMs... Could the oil pump be going out?

AV8R 04-06-2012 11:10 AM

Quote:

Originally Posted by blackforestgreen (Post 2225464)
i am am sure you checked to see if it was over filled. is the oil pressure increasing as you accelerate and dropping pressure when there is less of a "load" on the engine?

It increases with RPMs, but when I let off the gas it spikes to 80 or above for a second or two before settling at just under 40 during idle.

Baby Huey 04-06-2012 05:05 PM

Quote:

Originally Posted by AV8R (Post 2226790)
I don't know what the PO used before, but I changed all fluids when I bought it... I used 10w30. It is not over filled. Also, this just started happening recently, a good 2 weeks after I changed the oil.

I've read that the oil pump has springs and such to deal with different RPMs... Could the oil pump be going out?

I'll say No to the oil pump going out.....That "Usually" is not the case. Gear driven, they do have pressure relief springs inside. This prevents over pressure when it's cold so you don't blow off the oil filter.
I think If I were you, I would just go to a auto parts store and ask for a new oil pressure sender, screw it on and see if that fixes it. "BH"

AV8R 04-06-2012 07:39 PM

Quote:

Originally Posted by Baby Huey (Post 2227880)
I'll say No to the oil pump going out.....That "Usually" is not the case. Gear driven, they do have pressure relief springs inside. This prevents over pressure when it's cold so you don't blow off the oil filter.
I think If I were you, I would just go to a auto parts store and ask for a new oil pressure sender, screw it on and see if that fixes it. "BH"

BH, that is exactly what I did (cheapest and quickest thing to try; got the Echlin sensor at NAPA) and it is rock solid. It sits at about 25-30 at idle and 45-50 while cruising at 2500 RPMs. No fluctuations!

Thank you for the help! :punk:

Baby Huey 04-07-2012 09:37 PM

Quote:

Originally Posted by AV8R (Post 2228286)
BH, that is exactly what I did (cheapest and quickest thing to try; got the Echlin sensor at NAPA) and it is rock solid. It sits at about 25-30 at idle and 45-50 while cruising at 2500 RPMs. No fluctuations!

Thank you for the help! :punk:

SEEEEEE, I knew you could do it !! :thumb: Happy Jeepin Pal, and have a safe Easter!

"BH"


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