Mechanics

JEEP GRAND CHEROKEE OIL PRESSURE PROBLEM

2000 Jeep Grand Cherokee • 188 miles

The oil pressure gauge in my 2000 Jeep Grand Cherokee v8 4.7L fluctuates as I use the accelerator. It sits around 0psi anytime I am under 30mph and only goes as high as 40-50psi when on the highway. The "check gauges" light always comes on but since fluctuates like a speedometer would when you change speeds, it goes off all the time. Please help!
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Jeepy13
December 28, 2012.




Check the actual oil pressure with a mechanical gauge if its within specs- if it is consider replacing the oil pressure sending unit make sure its cleaned and properly connected before you replace it doing this and problem remain the same-Try an engine flush, the oil pump pressure relief valve could be sticking-

Tiny
Rasmataz
Dec 28, 2012.
Great! Thank you so much for the guidance! Much appreciated!
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Tiny
Jeepy13
Dec 28, 2012.
You're welcomed and Happy New Year

Tiny
Rasmataz
Dec 28, 2012.
I was asked to look at a Durango, 4.7L. The oil pressure gauge occasionaly drops to zero. The lifters get loud, so I trust this is not just a oil pressure sending unit issue. I see the oil pump is on the crank, not in the bottom pan, So I will replace it. Is the pressure regulator part of the pump assembly? It looks like it from the parts store pictures . I also have read where the pickup screen gets sludged up; will a engine oil flush clean this? Do you recommend a brand?

Thank you in advance.

Tiny
ShadeTreeJack
Feb 14, 2013.
I also meant to ask jeepy13 - was your issue the pump or the sending unit?

Tiny
ShadeTreeJack
Feb 14, 2013.
It was my sending unit. Since I've had it replaced there's been no problems!

Tiny
Jeepy13
Feb 14, 2013.
Thanks for coming back with the fix-

Tiny
Rasmataz
Feb 14, 2013.

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