Hi guys can u help with the noise coming from the middle of the car, 

started when I floored it a fluttering noise some people say it’s metallic sound others say plastic flapping?

had back box delete , made it slightly louder , put skrews in the splitter changed the sound slightly, one guy thinks it’s the middle box so could have  a sports muffler put on (but I don’t want it louder) Could it be air intake ? Has anyone had a fluttering sound middle of the car ? Two garages said just leave it but it’s anoying , car pulls perfect. 

1 hour ago, Nealgingerlovegod said:

Has anyone had a fluttering sound middle of the car ?

Is there a plastic cable tray around where the sound seems to be coming from?

I can’t see anything plastic under the car and nothing seems to move , someone suggest a turbo surge..

24 minutes ago, Nealgingerlovegod said:

I can’t see anything plastic under the car and nothing seems to move , someone suggest a turbo surge..

 

What a fecund imagination someone has, what the hell even is a turbo surge?

It's a well known problem caused by the invasive software which can only be resolved by a long slow low battery charge followed by a battery disconnect ECU reboot rounded off by a long slow hot oil change.

 

I'll get me coat!...............................