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When you put a new thread up in the Workshop please put your car's year and model in the post subject/thread title, along with just a brief indicator of the problem.

Car Year - Car Model: Brief description of issue. EXAMPLE- 1999 9-3. Problems starting when hot.

For Tech II issues or help requests please state the following in your title ''Tech 2 help required - state issue and your location ''.


Please also add as much information as you can about the problem, to your post.

This will help us to help you, without having to ask basic details such as what car you have.


Threads with non-compliant titles will be moved to The Pit Lane (in which no replies can be posted, but the OP can edit the thread - upon which the thread will be released to the workshop forum, note compliant threads will be moved back when the mod/admin team next visit the Pit Lane. if your thread has been sat in the Pit Lane for 24hrs+ after editing, pm Tech II to request release)

Nb. Generic thread titles for truly generic issues that genuinely are not model or variant specific (such as "how do I change the spring in an forge wastegate actuator") are acceptable

**The first 5 posts for new users require individual moderator approval (which they will only get it if they are in line the rules of the forum). Please be patient and allow time for that to happen, and avoid duplicate postings.**



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PostPosted: Mon Oct 19, 2020 9:34 am 
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Joined: Thu Mar 31, 2011 11:46 am
Posts: 5990
Location: suffolk
Car Models: 1993 9000 2.0 cse
hi can i ask advice for a mate who knows nowt about cars
hes got an 05 a3 sportback tdi manual

he rung up lastnight said his car backfired quite loud just after starting and pulling off big bang
never done it before now it wont pull smoothly
driving like a kangaroo
he got it 30 miles home and came round mine

ticks over fine revs fine static no big smoke out the back
bit smokey under the bonnet more than normal
i couldnt see anything obvios but it was midnight ish

hes gonna plug it in later today to find out what the computer says

but any ideas ???
if youve had an audi
as ive never had a new audi or any diesel audi
i know its all guesswork but hes a prison officer does 60 miles to work each way
he dont rag his car like a loony or owt
so what would a backfire cause then chaps
whats the most likely cause of an air leak after a backfire
thanks dave

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PostPosted: Mon Oct 19, 2020 10:09 am 
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Joined: Sun Aug 15, 2004 9:39 am
Posts: 42376
Location: SW Herts
Car Models: 2007 9-5 Aero est. 300hp Hirsch. 9-3 2010 9-3 Carlsson
Turbo hose blown off. Check the inlet pipeworks.

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PostPosted: Mon Oct 19, 2020 5:39 pm 
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Joined: Sun Oct 15, 2006 7:02 pm
Posts: 8497
Location: Reading, Saabshire.
Car Models: 97 9000 Aero 2.3T
Diesels dont backfire do they ?.
Its non flammable, so only goes bang under compression.

More than likely a boost pipe blew off. Modern diesel run really high boost pressure. 1.4 to 1.7 bar is quite common.
My sons girlfriend has a 2011 A1 1.6tdi and that was running really slow and with an engine light.
The boost pressure sensor had blown right out of the high pressure pipe and damaged the plastics at the same time. So had to replace that section.

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92 9000 CSE 2.0T TD04, Street Terrorist.
97 9000 Aero 2.3T JulesTune Stage 2+
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PostPosted: Mon Oct 19, 2020 10:16 pm 
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Joined: Thu Oct 08, 2009 10:19 pm
Posts: 4670
Location: Island of Sodor
Car Models: The Pizza Taxi
Defo agree with the above Dave. Follow the pipework

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PostPosted: Tue Oct 20, 2020 3:01 pm 
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Joined: Thu Mar 31, 2011 11:46 am
Posts: 5990
Location: suffolk
Car Models: 1993 9000 2.0 cse
ah easy enough to find once he got my ramps from me mums

the ally turbo to intercooler pipe went pop at the intercooler end
theres a little thin bit of ally goes around the little gromet
https://forums.tdiclub.com/index.php?th ... ak.456570/
the thin ally bits broken off so dont hold it together now

local parts guy cant get one he said same pipe on mk5 golf
said his engine codes a BKD
its the ally snake double bend one
any clever part numbers finders im not so god at that especially on a audi

not back at work till wed next week so no massive hurry

local garage person didnt seem like he wanted to bother even trying to get one ordered :wall:

local shop lady said this part number 1K0145770AF so that not right

its the S shaped ally pipe from turbo down to intercooler join
busted metal bit at intercooler end of ally pipe

could probably bodge it but he does 70 miles each way to work

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