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Grey smoke and odd noise every time I accelerate


Mark8602
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Hi all, just wondered if anyone could shed some light on this?

 

I have an Audi A3 TDI which piles out grey smoke whenever I accelerate (even a little bit). There is also a strange rumbling noise from under the bonnet. 

I have ruled out the DPF as the previous owner took that out, the egr valve has been blanked off. Video attached.

 

Any help or guidance would be appreciated.

 

Mark

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Hello Mark,

Not saying it is, but sounds like injectors then. If they are suspect than they are quite easily tested by a leak-back test. If it were mine, I would be entrusting it to a local recommended diesel specialist - not an ordinary garage. 

If you bought it recently from a dealer, then you should have redress. 

Kind regards,

Gareth. 

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At that mileage the engine should be OK unless it's been thrashed by a previous owner, which is a possibility given that EGR and DPF have been disabled. It's hard to tell from just a one second sound clip but it sounds like the rattle is from the top end of the engine, rather than big ends or main bearings.

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