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11-02-2016, 02:29 PM
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FF.Com.Au Hardcore
Join Date: Mar 2013
Posts: 805
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Having often heard a buzzing noise from my MC tdci on engine stop, and having recently turbo problems I did a bit of searching and found what seems to be the cause of the buzzing at least. It seems to be quite common. The turbo boost is controlled by a vacuum modulator driven by PWM from PCM. The buzzing comes from that valve. Anyone else wondering what this buzzing might be, take a look at this:
www.pierburg-service.de/ximages/pg_si_0076_en_web.pdf |
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Buzzing noise after engine stop
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