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Old 01-22-2014, 02:15 PM
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A 95 yj question

Hi everyone. I bought a 95 yj that needed a little work. It didn't run until I replaced the fuel pump. I also redid the interior, including bed lining the floors and replacing the carpet. Rear window was smashed so I replaced that too. There were several other little things I did too including repairing the doors. The jeep sat for a while cause the last registration on the jeep says 03.

I just started driving it and everything is great so far. My first question is, every time a come to a stop, I hear a bang, and it comes at random times. I can't tell where it's coming from cause I'm always inside when it happens. Somewhere underneath though. Any ideas? It's a 4.0 with an automatic transmission. It happens in drive, one time in park. Oh yeah and it's all stock suspension.

Thanks!

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Old 01-22-2014, 06:02 PM   #2
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Hard to say if you cant tell where its coming from, could be anything from slop in the drivetrain, to the exhaust hitting the floor or skid plate due to mounts being worn out.

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Old 01-22-2014, 07:56 PM
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Yes your right. It just happened again as I was starting the jeep, but I was inside. Seemed to have come from under the hood this time. It's so hard to tell or explain. I thought maybe it was something obvious that others experience with this model. It's for sure not exhaust or any loose mounts cause it's happened when parked. Something is clicking on every once in a while.
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Old 01-23-2014, 06:34 AM   #4
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Is it like metal hitting metal bang? I was wondering if it's not backfiring through the intake maybe causing the noise.
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Old 01-23-2014, 08:03 AM   #5
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Motor mounts? Transmission mount? Exhaust system loose and banging on something? U Joints?

Hint - fill out your Jeep profile - it makes answering questions easier.
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Old 01-23-2014, 11:04 AM
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I think its the a/c compressor, similar noise, just louder. Not really metal on metal, more of a clicking/switch noise. Everything else is in good shape from what i can tell. It happened a few times this morning, but didn't open the hood on time. Seems as though it happens more when cold, next time, ill be ready, but I really feel its the a/c compressor for some reason.
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Old 01-23-2014, 11:58 AM   #7
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Originally Posted by Skysail View Post
I think its the a/c compressor, similar noise, just louder. Not really metal on metal, more of a clicking/switch noise. Everything else is in good shape from what i can tell. It happened a few times this morning, but didn't open the hood on time. Seems as though it happens more when cold, next time, ill be ready, but I really feel its the a/c compressor for some reason.
Unplug the A/C compressor and see if the noise goes away.
It is possable that the compressor is cycling due to low freon level or cooler temperatures.If the problem goes away then you have found it.
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Old 01-23-2014, 03:18 PM
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Unplug the A/C compressor and see if the noise goes away.
It is possable that the compressor is cycling due to low freon level or cooler temperatures.If the problem goes away then you have found it.
Yes I think it's probably low on freon and it is pretty cold here. So far no noise, thank you!
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Old 01-24-2014, 03:17 PM   #9
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May not be my business but why would you have the A/C on in Chicago in Jan? Mine is a separate unit from the heating system all together. Is yours part of a factory in dash unit?
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Old 01-24-2014, 03:29 PM   #10
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Yes I think it's probably low on freon and it is pretty cold here. So far no noise, thank you!
It is actually regulated by a low pressure switch when its cold out the freon pressure is lower causing it to cycle more often. Add to that the fact the refrigerant oil in the compressor is colder than normal causing it to bang when the clutch engages.Either leave it unplugged till you need the a/c or leave it turned off. You may not even be low on freon it may be because its so cold.
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Old 01-25-2014, 08:53 AM
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May not be my business but why would you have the A/C on in Chicago in Jan? Mine is a separate unit from the heating system all together. Is yours part of a factory in dash unit?
That's the thing, it is off, and it is factory. Maybe there's a short circuit. I don't know, but I'll test the a/c closer to summer. I have not heard the noise in a few days now. When I pulled it into my shop, I turned on the a/c and the compressor was not turning on. Maybe a wiring issue.

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