paulf
Member Since: 23 Sep 2017
Location: Rutland
Posts: 91
  
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| Whistling on acceleration |
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Hi all,
My new to me D4 whistles on acceleration when the second turbo kicks in. Is this normal? It’s a constant and I’ve done 1500 miles since buying the car with no change in tone etc. Plenty of power, no smoke, no fault codes on IID tool. I ran live diagnostics tonight and turbo valve/boost pressure all matching what the car is demanding. No noise at lower revs on first turbo.
Air leak somewhere showing itself under high pressure?
Thanks in advance for any advice.
Paul Discovery 4 XXV
BMW 530d M Sport plus
BMW R1200GS Adventure
Aprilia RSV1000 Tuono
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 26th Sep 2023 8:06 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8227
 
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No not normal, check the hoses and intercooler for splits. It can when others can't,
It will when others won't,
It goes where others don't.
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| 27th Sep 2023 6:16 am |
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