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oil pressure

Old Jan 28, 2009 | 04:33 PM
  #1  
2001xj's Avatar
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Year: 2001
Model: Cherokee
Engine: 4.0
Default oil pressure

well i was running at about 60 at all times. and now it idles at about 35 and goes up to 45 on the highway 2000 Rpms. it just switched over night why is this? is it bad, should i be worried? thanks in advance
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Old Jan 28, 2009 | 04:58 PM
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finneys98xj's Avatar
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From: Virginia
Year: 1993
Model: Cherokee
Engine: 4.0L
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Oil pressure gauge are there is make you feel good about the motor. There are a lot of things that can cause it but you are fine, theres nothing to worry about
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Old Jan 28, 2009 | 05:14 PM
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From: Oak Harbor, WA.
Year: 1987
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Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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Are you positive you did nothing to cause this change? Like, changing the oil to clean. There could have been a blockage of sorts at the sending unit that broke free. As long as you're still seeing oil pressure and you have no obnoxious noises coming from your motor, I'd say you're golden.
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Old Jan 28, 2009 | 05:18 PM
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Year: 1996
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Engine: 4.0
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when was the last oil change?
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Old Jan 28, 2009 | 05:25 PM
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Originally Posted by jpdocdave
when was the last oil change?
500 miles ago.
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Old Jan 28, 2009 | 05:28 PM
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From: Oak Harbor, WA.
Year: 1987
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Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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35 PSI at idle and 45 PSI at Hwy. speed is closer to the truth, anyway, Bro. I'd say a blockage worked it's way loose and the gauge is NOW reading correct. That 60 PSI at all times wasn't right. So, your Jeep basically fixed itself. They do that from time to time.
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Old Jan 28, 2009 | 05:30 PM
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Mine is like 80psi at startup and idles at around 25psi in warm idle and highway cruising 2k rpms is about 45 and wot is like 65. My motor has like 230k miles though
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Old Jan 28, 2009 | 05:34 PM
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Year: 1987
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Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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1badZ, Your warm PSIs sound right and you have 80 at cold start up because your oil pump is trying to pull that cold sludge up that has sat in pan solidifying all night....
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