Recent content by ExSubi

The AIP winds down simultaneously with the engine. Is the noise you hear after the engine has been off for a minute? I’m trying to figure out a noise that occurs about 2 minutes after shutting down that sounds like an oboe kind of like you describe. I’m thinking it might be a heat shield...

Sorry to resurrect this. Did you figure out what this is? I have the same thing—a single pop shortly after shutting the engine off. I suspect it’s a heat shield contracting. When I gently tap the larger heat shield in the middle of the truck, the sound is pretty similar