got a buzzing/humming noise that randomly occurs when I lightly accelerate on my 04 f150 4x4 5.4 3v. The noise disappears once I let go of the gas or floor it. I have also noticed that the engine sort of bogs down when the noise occurs. I've found a video that shows exactly what my truck is doing but couldn't find any definitive answers. Any idea what could be making the annoying noise?
Do you have any codes popping up? To me the noise sounds like it could be a vibration in the exhaust system, maybe??? Missing the counter weight on the exhaust?
