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- Jeep Cherokee XJ 1984 to 2001 Why is Oil Pressure High
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High Oil Pressure
#1
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Year: 2000
Model: Cherokee
Engine: 4.0
High Oil Pressure
So I bought my 2000 XJ Sport last summer.
I took it in for an oil change the other day for it's first oil change since I got it and now my oil pressure guage rides at 80 when I start it after it sits in the cold for long periods of time. I checked the oil and it was in the safe area on the dipstick. The guy did mention that the oil was in bad shape, even though it had only been something like 3000 miles since the last change.
I can run it for 10-15 min and it stays at 80. Let it sit for like 10-15 min start it again and it will go back to normal readings of 20ish.
I am thinking maybe the sending unit or something of the likes. Just looking for any other ideas to look into.
Thanks for your help! You guys always have good answers.
I took it in for an oil change the other day for it's first oil change since I got it and now my oil pressure guage rides at 80 when I start it after it sits in the cold for long periods of time. I checked the oil and it was in the safe area on the dipstick. The guy did mention that the oil was in bad shape, even though it had only been something like 3000 miles since the last change.
I can run it for 10-15 min and it stays at 80. Let it sit for like 10-15 min start it again and it will go back to normal readings of 20ish.
I am thinking maybe the sending unit or something of the likes. Just looking for any other ideas to look into.
Thanks for your help! You guys always have good answers.
#4
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Location: Detroit,Michigan
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Year: 2000
Model: Cherokee
Engine: 4.0
#6
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If you're oil is getting that bad after only 3,000 miles I'd suggest that your car is running very rich or there's a problem with your air filtration, and IMHO is something to worry about. Do you get poor fuel economy too? These things aren't diesels, and the oil shouldn't be black after just 3k miles. My oil is what you'd expect in any gas vehicle after 3k miles, but I only have 90k miles on my Jeep too.
#7
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Year: 1998
Model: Cherokee
Engine: 4.0 HO
If you're oil is getting that bad after only 3,000 miles I'd suggest that your car is running very rich or there's a problem with your air filtration, and IMHO is something to worry about. Do you get poor fuel economy too? These things aren't diesels, and the oil shouldn't be black after just 3k miles. My oil is what you'd expect in any gas vehicle after 3k miles, but I only have 90k miles on my Jeep too.
It's just they way things work in the desert, we drive in dust all day long, every day, and it's flipping hot more months than it's not in the year. My jeep only has 160,000 miles on it, but I drive it hard.
It's the same with all my other vehicles, that's just the way they are some times...
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#8
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Year: 2000
Model: Cherokee
Engine: 4.0
It has 10w30 in it.
I am going to swap the sending unit.
Its been cold here in the mornings 20's-30's. The thing is it runs at 80 until you shut the car off and let it cool. They other night I drove 40 min with it just sitting at 80 the whole time.
I am going to swap the sending unit.
Its been cold here in the mornings 20's-30's. The thing is it runs at 80 until you shut the car off and let it cool. They other night I drove 40 min with it just sitting at 80 the whole time.
#9
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Year: 1999
Model: Cherokee
Engine: 4.0L
Mines runs at about 60 when accelerating or highway speeds then drops to about 20 at idol. I thought mine was a bit high too. What's the normal PSI range?
#10
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Year: 1997
Model: Cherokee
Engine: I6ho
My jeep is running perfectly, good fuel economy (low to mid 20's mixed driving...), no hesitation or stumbeling, both oil and air filters are well maintained, there's no coolant issues, compression is good...
It's just they way things work in the desert, we drive in dust all day long, every day. My jeep has 180,000 miles on it, and with 4.56's and 33's runs up handy 3000rpm 8 hours a week.
It's the same with my WJ wich never leaves the pavement and only turns 2200rpm on the highway.
Additionally, oils contain detergents... the oil should be black if it's doing it's job.
It's just they way things work in the desert, we drive in dust all day long, every day. My jeep has 180,000 miles on it, and with 4.56's and 33's runs up handy 3000rpm 8 hours a week.
It's the same with my WJ wich never leaves the pavement and only turns 2200rpm on the highway.
Additionally, oils contain detergents... the oil should be black if it's doing it's job.
Last edited by Mike H.; 01-14-2010 at 07:26 PM.
#12
Me Too!
Did you get your sending unit swaped? Did it fix it? Mine is doing the exact same thing. Just started last night, drove it home and parked it. If that didn't fix it where are you going from there?
FrankZ suggested that it's likely your sending unit because of the bypass in the oil pump. I agree with him but suppose the bypass was faulty, could cause the issue as well? I'm thinking of buying the sending unit on my way home from curch this afternoon.
Thanks guys for all of your imput you not only helped jfgreco but likelly me as well!
FrankZ suggested that it's likely your sending unit because of the bypass in the oil pump. I agree with him but suppose the bypass was faulty, could cause the issue as well? I'm thinking of buying the sending unit on my way home from curch this afternoon.
Thanks guys for all of your imput you not only helped jfgreco but likelly me as well!
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