This is a well discussed issue If you search through the existing thread's you will find discussions on "thunking" sounds, which relates to the gas tank issue you have described.
I just checked and no one has reported this in the Knowledge Base yet, but many of us have complained about it. I went ahead and logged it, but it added some symptoms, resolutions, and a link that I did not add. I'm not sure why it associated those with this new Problem and I can't delete them. But they do not apply to the logged problem.
Admin, could you clean that up? It is logged as Problem #15, and the current bogus items are Symptoms 1 & 2, Resolutions 1 & 2, and Link 1. It looks like this is data from the acuramdx.org site.