Oil pressure guage fluctuating
#1
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Year: 1999
Model: Cherokee
Engine: 6 Cyl. 4.0L
Oil pressure guage fluctuating
Hey everybody, I have a 99 Cherokee Sport with only 93k miles on it to date. It has been well-kept over the past years and until recently I havent noticed anything major needing repair. For the first time this past weekend I changed the oil and replaced the filter by myself rather than having to spend nearly $50 at a shop. By Monday morning I noticed issues with my oil pressure. At idle, my Jeep normally stays consistent at 40 but has been dipping close to 20 recently. On highway, it stays consistent between 40-50 like always. It is just after a while of being on the road that the pressure drops. I have always made sure to keep a steady eye on all my guages, so this issue has not been happening for longer than 2-3 days. Also, I noticed a gasoline-like smell when checking my oil levels on my dipstick. Is this normal? Granted, I have never actually checked the smell of it before so I do not know if the smell is normal. I have heard 6 different opinions on the issues and wanted to jump on this forum to see what is really going on, from true Jeep owners and not techs looking to weezel my money from me. Thanks guys!
#2
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Year: 1999
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Engine: 6 Cyl. 4.0L
Also,
Mechanics have said that it could be my PCV valve needing replaced, or carburetor filters needing cleaned, or just a different brand of oil filter besides Fram. As you can see I have gotten about every "guess" that it could be and would like to know if there is an actual issue...
#3
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
You need a new mechanic, he clearly knows nothing of how oil pressure works or that there is not a carb on your Jeep. The oil should not smell of gasoline, especialy after an oil change. How does the engine run?
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Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Mechanics have said that it could be my PCV valve needing replaced, or carburetor filters needing cleaned, or just a different brand of oil filter besides Fram. As you can see I have gotten about every "guess" that it could be and would like to know if there is an actual issue...
Did you use the correct weight and quantity of oil? Is is leaking, or is the level low?
Your 4.0L doesn't have a PCV valve, or a carburetor. It has a closed orifice system to rid the crankcase of vapors/blow-by, and it's fuel injected with a throttle body and individual injectors that spray fuel into each cylinders intake port when needed. You might need to pull the valve cover and clean out any build up of gunk that can build up and prevent the system from removing the unburned gas fumes/blow-by that can run down into the crankcase and dilute the oil. JMO
Here's a diagram of the system.
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Year: 1999
Model: Cherokee
Engine: 6 Cyl. 4.0L
My engine seems like it is running like normal. I used 6 quarts of 5w30 Pennzoil with a Fram filter. Something I forgot to add was that yesterday the oil was higher than normal when I went out to check it before leaving for work in the morning. When I went to a shop, it was more then halfway up the dipstick and kinda smelled like fuel mixed in with the oil.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Mechanics have said that it could be my PCV valve needing replaced, or carburetor filters needing cleaned, or just a different brand of oil filter besides Fram. As you can see I have gotten about every "guess" that it could be and would like to know if there is an actual issue...
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#10
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Year: 1999
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I finally got a accurate reading on my dipstick with the oil level being just a shade over full. If oil WAS leaking, wouldn't my oil pressure drop lower over time?? 6 quarts was what I read to fill in the Jeep's manual.
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Year: 1995
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Engine: 4.0 with all of the noise and clatter
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Year: 1998
Model: Cherokee
Engine: 4.0L
Oil Pressure
My 98 XJ just started having this issue where the gauge reads low at idle (parked, stopped) and goes steadily up as you give it gas. Could it be the oil pump is going bad/clogged?
Can a cold air intake make my pressure fluctuate? I just put one on today and that is when I notice the gauge jumping up and down.
Can a cold air intake make my pressure fluctuate? I just put one on today and that is when I notice the gauge jumping up and down.