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Strange sounds from my tdi...

Discussion in 'A3/S3/Sportback (8P Chassis)' started by rickyquicky, Jul 5, 2010.

  1. rickyquicky

    rickyquicky Member

    Dec 30, 2008
    Likes Received:
    When im in a low gear (usually 2nd or 3rd) at low revs and then put my foot down for a few seconds then come straight off the accelerator again, sometimes I get the usual quiet 'tshhh' from the dump valve/wastegate whatever you want to call it.

    Sometimes though it makes a sort of chattering noise that doesnt sound too healthy instead. It usually makes this noise lower in the revs when coming off the accelerator.

    Any ideas?
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  3. a3glenn

    a3glenn 6th gear

    Jan 17, 2010
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    i have the same sonund,

    i have a 140bhp tdi on a 53 reg, i have noticed this for a while now, im very sure there is nothing wrong, it is just the air from turbo being dumped, i think these tdi's have whats called a recirclating system and the noise you can here is the air hiting the turbo blades (this is normal)

    i have fitted a green cotton air filter that replaces the standarded box filter, the noise is louder as the filter breaths better

    very sure there is nothing wrong with your car

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