Rattling sound when ICE shuts down and Electric Engine kicks in

[GSamkh]

Greetings,

 

I have come across with a strange situation today. My 2014 Titanium Energi has been working fine. But today I heard some strange noises coming from the hood. So, I live in Georgia (the country, not the state). It's very hot here. I just came back from work and plugged in my car for charging (outside). When I went out, I tried using EV mode, but it said that the engine needed to be enabled. I guess this is normal, because it's very hot and the electric engine could not manage to cool down in time. This has happened before when its very hot and I am not worried about that. But the problem now is that, even though the engine is enabled, the hybrid part still works, right? So, every time ICE shut down and electric motor kicked in, I heard a weird noise and it seemed liked somehow at that moment car was jumping forward a little. I stopped the car to check and when I let the ICE turn on and wait for it to shut down, there is a very strange rattling noise coming either from ICE or from the electric motor part, right next to the ICE. I have experienced this once or twice a couple of months ago, but it did it only once and then the problem went away. Again, today, I let the car sit for a while, tried it again and now there is no such sound anymore.

 

I also noticed that, the car gets very week while using AC and shimmers somehow. I am sure that I have to change spark plugs because of this, since it is still due for changing. Is there anyway, this sound might be connected to spark plugs? If not, what can be causing this and should I be worried?

 

Any help will be greatly appreciated.

 

I am attaching a video for the demonstration -