Hello,
This sounds like something has come loose and it is rattling when there is a load placed on the engine or when it is at a certain RPM range. Have you checked under the hood to see if any metal lines like A/C lines, brake lines, fuel lines, etc. Might have come unbolted from the supports? That is where I would recommend starting first. Please check for this condition and get back to us with what you find. We can go from there if needed.
Thanks,
Alex
2CarPros
Friday, February 28th, 2020 AT 3:56 AM