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Hi All

wanted to find out something. Last week i took off from a traffic light and i heard a strange noise similar to that of a "pop" and i lost power. I then pulled off, switched off the treg and restarted, pulled off and there was a whistling sound. I opened the bonnet and when i rev the car i noticed that the left intake pipe shrinks. I new it was the turbo but the strange thing is that non of the warning lights came on... is this common?

Thnx
 

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Could be the bypass valve, not sure though... I've had previous turbos do what you describe and that was the problem. It didn't necessarily throw a light on the dash (in an Audi S4).
 

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If you hear a whistling sound, maybe an intake hose has split? Do these have wastegates? If so, the wastegate actuator could have let go.
 
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