125d n47 tapping noise when flooring it

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Manufactured from end of 2011

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PattyM20
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125d n47 tapping noise when flooring it

Post by PattyM20 » Sat Oct 20, 2018 12:21 pm

Hi guys, ive had my 125d for around 3 months now, its the 8 speed auto, and ever since ive owned its made a flapping noise only when giving it some stick, replaced the swirl flaps so its not them, people are said it could be the air/fuel ratio from the remap but i dont know because it was mapped before i got it, its coming from the front and as its only then flooring it then it must be mechanically, has any of you experienced anything like this? I have got a rattle coming from the aux belt/crankshaft pulley when letting off the revs so could this be related? See videos attached, thanks
https://streamable.com/w5buu
https://streamable.com/o49ci

OK51MON
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Re: 125d n47 tapping noise when flooring it

Post by OK51MON » Sat Oct 20, 2018 3:33 pm

Fan
321 bhp & 478 ft lbs- 125D
Quaife LSD
M140i under brace
Power flex Subframe mounts
Wagner Evo 2 IC

PattyM20
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Re: 125d n47 tapping noise when flooring it

Post by PattyM20 » Sat Oct 20, 2018 7:43 pm

Thanks for the reply, is this from experience or a guess? Thanks


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