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Hi there, new to the forum so hope you guys can help!
Got a 2004 vivaro 1.9 dti 130,000 on the clock. Vans been serviced regularly with correct oil and parts and has run great for the last few years then about 6 months ago started having a slight air/dump valve sound sound when pulling away in 1st, 2nd and 3rd and now has suddenly started making a slight metallic knocking noise in idle aswell which quietens down wonce the engine warms up. Also blows a bit of black smoke out when pulling away in 1st and 2nd. I'm wondering if this could be caused by an egr problem or boost leak maybe. Have put a video of the sound on YouTube, let me know what your thoughts are?
Thanks in advance to anyone that can advise.
 
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