It could be an air leak, which may have reduced the whistle I was getting before.
I hear a lot of things about turbo hoses splitting, but I don't know where to start looking to check.
It's not running on as such, just maybe having one more tick before actually going off completely.
It's not running any differently (in terms of temperature and idle speed etc) as it was previously.
Driving it today, the turbo doesn't seem to be as progressive as it was previously, it's kicking in, but it's all coming in one lump whereas before it was a lot smoother.
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