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post #1 of (permalink) Old 12-19-2000, 02:18 AM Thread Starter
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Need Help...Hissing noise from backend

Okay, I did some pretty hardcore offroading yesterday and today I came to hear something I don't believe was there. Down around the rear part of my YJ, around the gastank, there's a hissing noise. When I first start my Jeep and listen for the sound, it's not there. Then about 5 seconds later is starts. I can't figure it out. Since my Jeep is stock height, I bashed the underside pretty good on some rocks. My first thoughts on this is there's a pressure leak in the fuel tank or around there. Any ideas? I may crawl underneath it in a bit and look around. It also makes a wierd rattling noise from under there also. Only happens when it's a bumby road. You can hear the rattle insinde. But the hissing can only be heard from behind the Jeep. Hope someone can help me out!

"James and the Giant Jeep"
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post #2 of (permalink) Old 12-19-2000, 02:58 AM
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Re: Need Help...Hissing noise from backend

Do you smell gas fumes when this sound is happening?

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post #3 of (permalink) Old 12-19-2000, 03:26 AM
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Re: Need Help...Hissing noise from backend

Do you have an in-the-tank fuel pump? If so, it could possibly making a noise that sounds like hissing. My wife's Suburban has a loud fuel pump and has gone through several stages of noise making. Since you may have knocked something loose it could have a weird vibration.

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