Hey all, have an 07 mdx tech package with 145k miles. Starting about a year ago, I noticed what sounds like rocks shaking around in a tin can, coming from under hood, on passenger side. It was quiet and only occurred when I put the “pedal to the metal” in order to accelerate rapidly when merging onto a highway, etc. Now it is louder and I’m worried it’s something serious. The noise ONLY occurs with hard acceleration, goes away once I’m at a coasting speed. Any guidance would be greatly appreciated!!