nat Posted May 24, 2023 Share Posted May 24, 2023 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 Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted May 25, 2023 Share Posted May 25, 2023 23 hours ago, nat said: 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 Hi hazard a guess its the trunking either side of the airbox, as it gets older the plastic deteriorates and allows extra air in. Steve. Quote Link to comment Share on other sites More sharing options...
nat Posted May 25, 2023 Author Share Posted May 25, 2023 The trunking? Do I need to replace the airbox? I've managed to add a video of the noise Thank you 20230517_183804.mp4 Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted May 26, 2023 Share Posted May 26, 2023 20 hours ago, nat said: The trunking? Do I need to replace the airbox? I've managed to add a video of the noise Thank you 20230517_183804.mp4 Hi the trunking is what carries the air from the intake through the air filter box and then into the turbo, subject to your video I would definitely be checking the rubber turbo hoses first before replacing the induction parts. Steve. Quote Link to comment Share on other sites More sharing options...
nat Posted May 26, 2023 Author Share Posted May 26, 2023 I've now got a slight whistle when I accelerate and it gets louder when it gets hotter. Quote Link to comment Share on other sites More sharing options...
nat Posted May 26, 2023 Author Share Posted May 26, 2023 Also if I rev it the sound goes but comes back about a minute later. No smoke either Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted May 27, 2023 Share Posted May 27, 2023 22 hours ago, nat said: I've now got a slight whistle when I accelerate and it gets louder when it gets hotter. Hi definitely a split turbo hose the whistle is the air escaping, best get it sorted a bit sharpish as the car won't regenerate the DPF if its loosing boost pressure. Steve. Quote Link to comment Share on other sites More sharing options...
nat Posted May 27, 2023 Author Share Posted May 27, 2023 Ok thank you I'll get that looked at thank you Quote Link to comment Share on other sites More sharing options...
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