nat

Ok thank you I'll get that looked at thank you

Also if I rev it the sound goes but comes back about a minute later. No smoke either 

I've now got a slight whistle when I accelerate and it gets louder when it gets hotter. 

The trunking? Do I need to replace the airbox? I've managed to add a video of the noise

Thank you

Hi wondering if anyone can help. I've got a audi a4 57 plate 1.9 diesel. It's making a chugging noise like air chugging if you lift the top of the airbox you can hear thr noise louder. When driving it sounds like I've got a blowing exhaust. Car drives fine no loss of power. Had it plugged I no faults found.  Its driving me mad as I've had few people look at it but noone can seem to find the problem 

Thank you