Engine rattle when accelerating?

Most of the time this kind of noise will be associated with the exhaust system, like a heat shield or the catalytic converter that has come apart internally. I would wait until the engine is cold and then tap the exhaust system with a rubber mallet. This should help you find out where the noise is coming from. Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on.

Here is a guide to help with an engine rattle problem:

https://www.2carpros.com/articles/rattle-noise

Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.

You can hear it just after the camera moves a little. Around the 2 second mark. Like I said it's very faint which makes it hard to capture. This was at around 45mph in 6th gear around 1,200-2,000 RPMs. I had it in 6th trying to find it in that low RPM range while accelerating.

thanks for the video. Can you get an idea of where in the car the noise is being generated? I would raise the car up and look underneath, also use the rubber hammer and tap on things this will help pinpoint the sounds source.