91 Jeep Cherokee LTD, 4.0, 4X4 rattling noise when idle

MELLISSA68

MEMBER
1991 JEEP CHEROKEE

I have had my, 91 Jeep Cherokee ltd 4 wheel drive with 4.0 liter and 191,000 miles, for a little over a year now. A few months after I got it, it started to make a noise that sounded like it needed oil added. I kept checking the oil and the levels are always norm. After awhile the noise began to get louder and I noticed that the noise only happened when idling in or out of gear but would stop completely when I would rev it up in or out of gear. (The noise sounds as if it is coming from behind the engine)

It sometimes will stall out after it has warmed and you put it in gear or if I rev it up too quickly. Not sure if it is part of the same problem or two different problems.

These are the only problems that I have or had other than needing to recharge A/C, new brakes, and the usual service.
HELP PLEASE!

1 Reply

SERVICE WRITER

MECHANIC
9,123 POSTS

Really hard to say if it is related. For the noise it probably needs to run while up in the air to hear where it's coming from. Thats a tough one for the Internet.

The drivibility problem wouldn't surprise me if it is a carbon build up that may be able to be fixed by using some seafoam carbon remover. It's a cheap attempt, if it doesn't take care of it, it will need to be trouble shot.