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OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs.

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  #1  
Old April 17th, 2007, 04:18
ZJeepX ZJeepX is offline
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Weird Noise

when my car is ideling i can here a weird noise coming from the back. when i get out and get close to the rear bumper it sounds like air leaking from a tire with a hole in it. But my tires are fine and when i try to find where its coming from i cant find it, iv crawled under the car and everything. Its really bugging me. I know its not from my tires and im almost positive its not coming from my exhuast, what could it be?

its a 92 4.0 aw4 stock
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Old April 17th, 2007, 04:51
dspilot dspilot is offline
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Re: Weird Noise

It's probably your fuel pump.
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Old April 17th, 2007, 09:58
88xjchief 88xjchief is offline
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Re: Weird Noise

If its like air leaking its prolly your fuel pump. Mine does the same thing.
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Old April 17th, 2007, 18:13
ZJeepX ZJeepX is offline
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Re: Weird Noise

is there an easy cheap fix or is it even a big deal?
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Old April 17th, 2007, 20:41
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4x4Fox 4x4Fox is offline
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Re: Weird Noise

I have a 93 and hear the same thing.
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Old April 17th, 2007, 22:24
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90Blue_XJ 90Blue_XJ is offline
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Re: Weird Noise

Thats just the nature of the beast. When I turn on the key I wait until the fuel pump has pressurized the line before cranking. This saves wear and tear on the starter, because the engine will not start without fuel and it takes fuel pressure to open the injectors. That leaking air noise is your friend. Don't try to make it go away. Embrace it and learn to live with it.
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