[LOK NUT]

Hi,
my 2006 X model makes 'strange noises' at high revs. 'Strange noises' meaning that the rev note changes and sounds strange, like the engine is "hollow"
Sorry for my poor description but I am relatively new to car maintenance.
I am thinking Ignition Coils?
Thanks
LOK

 

[07fozzie]

I would like to hear this on a video or something. I'm not really sure where i would start from the description.