weird noise

My 02 jeep has been making a weird noise. It actually sounds like a fart. Seriously. And if I have a passenger sitting in the car they can feel it on their feet. I can't feel it on the drivers side, but I can hear it. It does it when ever it wanrs to. Only when the car is on though. Whether it is standing still or moving and I can't do anthing to re-produce it. It will just do it. Sounds like maybe a air pressure release or something. Any thoughts?

02libby said:

My 02 jeep has been making a weird noise. It actually sounds like a fart. Seriously. And if I have a passenger sitting in the car they can feel it on their feet. I can't feel it on the drivers side, but I can hear it. It does it when ever it wanrs to. Only when the car is on though. Whether it is standing still or moving and I can't do anthing to re-produce it. It will just do it. Sounds like maybe a air pressure release or something. Any thoughts?

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Three questions.

1. Is it always the same passenger?

2. Do you eat a lot of salad and beans?

3. Is there an odor?

MidnightLiberty said:

Three questions.

1. Is it always the same passenger?

2. Do you eat a lot of salad and beans?

3. Is there an odor?

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HA ha ha. Nice. I knew I was going to get a reply like that. That is why I never posted this problem. But seriously, it is making this weird noise. And no odor happens after. HA! Any other serious thoughts about what it could be?

Let us know what you find, 02Libby. My liberty did the exact. same. thing. for several months, then it went away. Now it has a rubber creaking kind of noise when the temps get cold in the front end. I've talked to the dealer about it, they just shrug their shoulders-- but admittedly haven't had a long time to look at it. I've done checks on my ball joints -- they seem ok. When weather is warm, no creaking noise. The 'burp' noise that it made (like you describe) would sometimes happen when the vehicle was stopped at a light. Usually once after starting it up and driving it-- usualy in the first ten minutes. It actually sounded a bit like a windshield wiper on dry glass. Seemed to come from passenger side.

jnaut said:

Let us know what you find, 02Libby. My liberty did the exact. same. thing. for several months, then it went away. Now it has a rubber creaking kind of noise when the temps get cold in the front end. I've talked to the dealer about it, they just shrug their shoulders-- but admittedly haven't had a long time to look at it. I've done checks on my ball joints -- they seem ok. When weather is warm, no creaking noise. The 'burp' noise that it made (like you describe) would sometimes happen when the vehicle was stopped at a light. Usually once after starting it up and driving it-- usualy in the first ten minutes. It actually sounded a bit like a windshield wiper on dry glass. Seemed to come from passenger side.

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Rubber creaking, esp in the cold, is usually the swaybar bushings.

-not relevant

jnaut said:

Let us know what you find, 02Libby. My liberty did the exact. same. thing. for several months, then it went away. Now it has a rubber creaking kind of noise when the temps get cold in the front end. I've talked to the dealer about it, they just shrug their shoulders-- but admittedly haven't had a long time to look at it. I've done checks on my ball joints -- they seem ok. When weather is warm, no creaking noise. The 'burp' noise that it made (like you describe) would sometimes happen when the vehicle was stopped at a light. Usually once after starting it up and driving it-- usualy in the first ten minutes. It actually sounded a bit like a windshield wiper on dry glass. Seemed to come from passenger side.

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Yeah I don't know. I have been under it a bunch of times now And I cant find what the heck it is. The only problem I have found is I have a torn boot around my tie rod on both sides. Everything else looks fine. And that is exactly what it sounds like too, the wiper on a dry window and coming from the passenger side. I called the stealership and they have had no one else come in with this problem and I would have to reproduce it so they could diagnse it. Which I cant because it happens whenever. I was at a stop light the other day and it did it. The driver next to me looked over at me with the weirdest look on her face. I looked back and shrugged my shoulders and laughed. The look on her face was priceless. Do you have a manual or auto Liberty?

Its not a buzzing noise at all?

Only thing I can think of that would make that noise is the purge pump for the evap but Ive only heard it when the jeep is off. I cant hear much over my exhaust anymore. I think that pump is in the gas tank area.

02libby said:

[...]The driver next to me looked over at me with the weirdest look on her face. I looked back and shrugged my shoulders and laughed. The look on her face was priceless. Do you have a manual or auto Liberty?

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Mine is an '04 auto. LIke I said, it stopped doing it about six months ago... so I'm not sure what to think. It was almost like a spring or something was compressed and then would release. It would only do it once per trip. Once the noise was made, it wouldn't make the noise again during that trip. If I parked for a period of time, it would then make the noise after being in the car for about 10 minutes.

JeepJeepster said:

Its not a buzzing noise at all?

Only thing I can think of that would make that noise is the purge pump for the evap but Ive only heard it when the jeep is off. I cant hear much over my exhaust anymore. I think that pump is in the gas tank area.

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No, definitely not a buzzing noise. It's a short brrrrrrrrp, then it's done. Again, it was much like a dry wiper swiping across clean glass. But just once.

how do you have your heater/AC controls set?

Sounds to me like a vent opening. Play with the AC and see if you can recreate the sound.

Do you have a rear axle with trac-lock? If so you may want to try changing the fluids and add friction modifier.

bugnout said:

how do you have your heater/AC controls set?

Sounds to me like a vent opening. Play with the AC and see if you can recreate the sound.

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When it was last happening-- heat floor, no AC or Defrost (compressor). I don't believe that was the thing. But I'm open to anything. Problem is, sound is now gone.

icarl said:

Do you have a rear axle with trac-lock? If so you may want to try changing the fluids and add friction modifier.

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Stock 04 with 42rle Command-Trac. All fluids regularly changed.

I had this happen to me yesterday,but it sounded like rubber suspension bushes creaking, so maybe it's something else. Getting the suspension to move by accelerating and braking would reproduce the noise, but after about 5 minutes it went away.
You can spray silicon lubricant on the suspension bushes (sway bar, trailing links, A-arms) but don't use any mineral oil as the rubber may swell.

Just wanted to let OP know, I realized that this is what I was trying to explain on another thread. I have the same noise, sometimes it feels like metal clamp closing, sometimes it would sound like someone squeezed one loose. Today it sounded like air got out of a small baloon very fast and ended. It is always from the front end, almost like above the wheels. A few times I thought I ran over loose manhole cover, but it was not that.

haha, some of these descriptions are funny stuff.

Other than the ****** solenoids downshifting idk what it could be.

^^ I got an occasional "jeep noise" too......is there a "Jeep Gremlin Excorcist" in the house???

Dave

OK, Here we go, I started hearing it more often. Just today alone twice..
Another way to describe the noise would be a plastic bottle that was squeezed a little popping back into shape but ends similar to a burp.

Fascinating. I'm pretty sure we (were) experiencing the same thing. Like I said, my noise kind of quit after about a year and I don't think I've heard it for a good long while now.

I've expanded my theory to a possible hand brake assembly issue. The only problem I ever had was with my hand brake which had to be replaced in the third year. Now it doesn't seem to be adjusted correctly.

Here's my theory: the e-brake mechanism stays partially 'engaged' for a few minutes, then releases under the spring tension through the vibrations of normal driving. That's what's making the noise.