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Author Changing battery, smokey smokey.
Tiger
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Registered: 12th Jun 01
Location: Nuneaton Drives:Audi A4 2.0TDi
User status: Offline
1st Dec 17 at 09:07   View User's Profile U2U Member Reply With Quote

Hereís a weird one for you, Iím new to modern diesels so could be quite normal.

Changed the battery on my 2007 Audi 2.0TDi, the engine was warm when I shut it off and changing the battery took me 20 minutes. When I started the car after changing the battery it was chucking out diesel smoke for fun for about the first mile then cleared. When I pulled back up at home it was burning cleaning as a whistle? Its not been a smokey car since I bought it and has been fine since.
DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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1st Dec 17 at 09:59   View User's Profile U2U Member Reply With Quote

Why did you charge a battery for 20 minutes? It will receive more charge from the alternator running for 30 seconds.
Tiger
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Registered: 12th Jun 01
Location: Nuneaton Drives:Audi A4 2.0TDi
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1st Dec 17 at 10:50   View User's Profile U2U Member Reply With Quote

I changed the battery....
tom130691
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Registered: 13th Sep 08
Location: Daventry
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1st Dec 17 at 12:52   View Garage View User's Profile U2U Member Reply With Quote

Id assume the ecu lost its data and had to recalibrate



my corsa
my mini

You know you own a mini when you've changed your shower gel for swarfega.
Ian
Site Administrator

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Registered: 28th Aug 99
Location: Liverpool
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1st Dec 17 at 13:00   View Garage View User's Profile U2U Member Reply With Quote

Complete guesswork but yes, does sound like it need to get its act together after losing the memory.


Corsa B lap belts required
Tiger
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Registered: 12th Jun 01
Location: Nuneaton Drives:Audi A4 2.0TDi
User status: Offline
19th Sep 18 at 16:52   View User's Profile U2U Member Reply With Quote

Update on this, from ages ago! Problem persisted and I also suffered from a hesitation on light acceleration too. Anyway, I had issues with the VAC controller which was replaced along with the inlet manifold and it cured the hesitation. The smoking remained anyway, mainly if I drove the car to its running temp then turned off the engine and started it an hour later. When at temp it was clean as a whistle. So now Iíve had the fuel filter changed and the DPF (which was 96% blocked) terracleaned. The DPF was blocked because of a faulty EGR valve which inhibits the DPF from regenning. Anyway, problems solved for now and the DPF has automatically regenned which it didnít do before. Watch this space got its MOT next month, if problem persists, the injectors will be coming out and go away for testing, then thatís the whole inlet side investigated!

 
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