I just bought this 1999 Jeep Cherokee and I am worried about this sound... Any help?

4.0L Inline 6

Engine has a rough idle, poor gas mileage, oil pressure goes between 30-60

 

May have a stuck lifter.

 

I hear injector noise, a possible exhaust leak and maybe some lifter noise. Mine sounds like a diesel when idling but goes quiet when revved. 4.0s are noisy critters anyway. I bet someone her can do better diagnosing than me tho. Hows it run ?

 

Did it sound like that when you were looking at it to buy? Or did it start mysteriously after you brought it home......

 

Isn't this the spot where someone says to run seafoam through it ? :P

 

Any idea how I fix that? Haha

 

Well, I don't remember because I was so excited to finally find an xj in my area that I just kind of bought it without even thinking about anything. haha :/

 

Basically, I am just trying to figure out my best course of action. There are some other things I am planning on fixing (rust on passenger floor pans) and I just want to be sure it is worth it.

Is there anything quick and cheap I can do to try to fix it? Is this something that's not that big of deal? Is it something that I should just sell?

Help an XJ noobie out haha

 

Doesn't sound like anything catastrophic. What's it look like under the oil filler cap? Clean? Sludged?

 

Get used to it.....it will probably sound like that for the next 100,000 miles!!

 

I hope for your sake and sounds like a lifter tick.
Since its new to you,I would change the oil to shell t6 and add this *.
It worked on my wife's GC.

 

Yep, and use a Wix oil filter.

Look into the oil filler cap to assess the sludge.