Hearing air releasing at engine shut off?


New Member
Dec 2, 2023
North Carolina
Today I had the hood opened when I cut the engine off and I heard a “poof” of air being released somewhere under the hood. Standing at front of jeep I had someone start and cut it off. It does it every time. I’ve never heard it before today. It sounds just like when you bump the valve stem for half a second. Cold start and shut off at operating temp. And warm start running for at least an hour, both made same result.

2014 jku sport 180k
Do you have a "cold air intake" installed? I can hear air when I shut mine off.