3.8l 25k MILES makes weird pop/ hiss right when shut off - Jeep Wrangler Forum
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Old 10-19-2013, 09:45 PM   #1
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3.8l 25k MILES makes weird pop/ hiss right when shut off

Words will not do this justice... 2009 3.8 l 25K miles. When shut off, turn key off, engine quits, then a pop/hiss kind of noise, one time... not expecting this to be solves, just wondering if anyone has heard this behavior...
By one time I mean it does not repeat in that cycle, happens at every shutoff...

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Old 10-20-2013, 07:17 AM   #2
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kind of like the sound of a beer can being opened

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Old 10-20-2013, 08:31 AM   #3
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Can you record/film the noise ?
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Old 10-20-2013, 12:29 PM   #4
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Vid of sound around 6 second mark

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Old 10-20-2013, 01:24 PM   #5
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I know I'm stumped. No clue. Is there any way you can narrow down the area in the engine compartment.
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Old 10-20-2013, 01:50 PM   #6
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I can't get around to the engine bay fast enough unfortunately ...
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Old 10-20-2013, 04:08 PM   #7
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https://www.facebook.com/photo.php?v...46456051932860

got a kid to kill the engine for me.... thoughts...
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Old 10-20-2013, 06:17 PM   #8
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It definately seems like it's coming from the throttle body, but since mine is quiet I don't know if that would be considered "normal". If it's otherwise running o'k I'm not aware of a possible inexpensive fix. Maybe someone can give a more definitive opinion on it. Maybe it just needs to be cleaned. I'm not sure and I don't want to point you in the wrong direction.
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Old 10-20-2013, 06:37 PM   #9
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stumped

runs fine, rolling 21 mpg avg, not eating oil, no codes... stumped... I can say I don't have patience for issues and will trade it before I spend any significant amount chasing it... not married to having a jeep...

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