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Carbon build up

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lee10 View Drop Down
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Joined: 14 Oct 2015
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lee10 Quote  Post ReplyReply Direct Link To This Post Topic: Carbon build up
    Posted: 18 Aug 2020 at 2:59pm
Hi i have a 2011 qashqai 90k miles, for the last 6-9 months i have been hearing a whoop whoop whoop noise when starting the car.......it completely baffled me but ended being a carbon build up on cylinder 2. 
Mechanic cleaned the carbon off but a week or 2 later the noise has returned.
Thinking of getting someone round to do an engine carbon clean he uses hydrogen to clean the carbon.
Has anyone had one done and also why am i getting a build up if carbon on cylinder 2
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zh875 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zh875 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Aug 2020 at 3:43pm
Could be an injector problem on cylinder 2

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Tiffany View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tiffany Quote  Post ReplyReply Direct Link To This Post Posted: 18 Aug 2020 at 6:34pm
Before you go to the expense try a good  cleaner in the system. Forte fuel system cleaner is excellent. It will clean the fuel lines, injectors and  even works after the burn.
2020 Qashqai 1.3 Dig-T 160 Tekna + DCT.storm white.
2017 X-Trail N Vision 1.6 DIG-T Storm White.
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lee10 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lee10 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Aug 2020 at 7:49pm
Thanks, i'll definately try that....which diesel treatment would you recommend as there seems to be a few
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Tiffany View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tiffany Quote  Post ReplyReply Direct Link To This Post Posted: 19 Aug 2020 at 8:19am
Well they do 2 or 3. One kills bacteria... yes bacteria  !  it grows in  diesel tanks fuel due the water  Ingress .
Bacteria  can block injectors. And cause untold running problems.
They  have one for DPF’s 
They have a technical line give them a ring.
2020 Qashqai 1.3 Dig-T 160 Tekna + DCT.storm white.
2017 X-Trail N Vision 1.6 DIG-T Storm White.
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lee10 View Drop Down
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Joined: 14 Oct 2015
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lee10 Quote  Post ReplyReply Direct Link To This Post Posted: 19 Aug 2020 at 8:25am
Will give them a call, many thanks for the advice much appreciated
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