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  1. 3.0 TDI problem 
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    Hi ppl

    I have a 06 A4 3.0TDI quattro, had it a few years now with no issues what so ever but now its got a problem.

    Some times when I am cruising at a steady speed and then put my foot down the car picks up power and then suddenly looses power and the coil light flashes on the dash.

    Some days its fine, but today whilst driving to work at steady local speeds it just cut out. Tried strating and it would fire up and then cut out with coil light flashing. I left it for about 30mins whilst waiting for the AA and then when he arrived started the car again and it was fine. AA followed me back home and the car drove fine but only drove at steady speed.

    Not going to drive it now as it might cut out on me again, got it booked in at local specialist lets hope its nothing too serious.

    My thoughts are possibly fuel pump is on its way out ?
    Coil packs ?
    Turbo wastegate ?

    I hope its not the actual Turbo as that will be expensive but I'm guessing that if it was the turbo then it would happen all the time ?

    Anyone had similar problem....your thoughts ?
    A4 3.0TDIQ S-Line
     
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  2. Re: 3.0 TDI problem 
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    Hi,

    Are you talking about the symbol that goes out when the glow plugs have finished heating?


    Obviously not an A4, but you get the idea.

    If so, it mentions something in the handbook about what that flashing warning symbol means.
    Sorry, I don't have a handbook for my current car, otherwise I'd look it up for you.

    Al
    [ My Cars: '06 A6 S-Line 3.0 V6 TDI Quattro | '07 VW Touran 2.0 TDI DSG | '09 TT 2.0 TFSI Roadster ]
    [ Past Audis: A4 3.0 TDI Quattro S-Line | S6 4.2 Quattro | A4 2.5 V6 TDI Quattro Sport | A4 1.9 TDI Quattro S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed ]
     
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  3. Re: 3.0 TDI problem 
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    Yes thats the one...will check it out
    A4 3.0TDIQ S-Line
     
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  4. Re: 3.0 TDI problem 
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    When I got my 3.0 tdi, on occassion, I'd try accelerating from steady speed and the revs would hesitate until I backed off throttle then it would clear and fly to redline.Dealer diagnosed turbo fault and fitted new one under warranty.Then the problem came back within 500 miles.After having the car for 3 days dealer diagnosed "partially blocked or collapsing fuel filter" and fitted replacement under warranty.Problem has not recurred over last 13000 miles,hope this is of help,Steve.
     
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  5. Re: 3.0 TDI problem 
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    Quote Originally Posted by cyrusK View Post
    When I got my 3.0 tdi, on occassion, I'd try accelerating from steady speed and the revs would hesitate until I backed off throttle then it would clear and fly to redline.Dealer diagnosed turbo fault and fitted new one under warranty.Then the problem came back within 500 miles.After having the car for 3 days dealer diagnosed "partially blocked or collapsing fuel filter" and fitted replacement under warranty.Problem has not recurred over last 13000 miles,hope this is of help,Steve.
    Hi Steve, was your coil light flashing when the hesitation happened ?

    I changed the fuel filter at 40k....car is now on 55k...i hope it is something as simple as that.
    A4 3.0TDIQ S-Line
     
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  6. Re: 3.0 TDI problem 
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    Unfortunately a flashing coil light could mean many many different things. You need a diagnostic scan to find out what exactly the light was trying to indicate.
     
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  7. Re: 3.0 TDI problem 
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    I think I saw an engine management light come on 2nd or 3rd time fault occurred,before that was more concerned about what was happening.Dangerous when you pull out to overtake and go nowhere. The car had 24000(approx) when it first happened, last september,its an '05 3.0tdi,now at 37600.
     
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  8. Re: 3.0 TDI problem 
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    Found my copy of invoice for warranty work.States:two faults on turbo,carried out test plan,linkage tight and notchy,requires new turbo.Invoice shows £297.55 labour/diagnostic checks and £893.51 for turbo after discount.Second invoice states: carried out extensive diagnostic tests/ extended road tests,traced fault to partially blocked fuel filter.Shows£290.36 labour/diagnostic checks and £41.43 for filter.
     
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  9. Re: 3.0 TDI problem 
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    There is a problem with the fuel filters and they have been modified but most common issue for 3.0 tdi sticking waste gate electric motor and wiring mod for chaffed wiring loom.There is a software update for the electric motor to reset the values but you need a fault code to confirm.The fuel filter issue stores a fuel pressure fault code
    vag diagnostics, retrofits and general repairs
     
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  10. Re: 3.0 TDI problem 
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    Just out of interest a8 tech...

    What is that loud popping noise that can be heard about 10 seconds after the 3.0 TDI engine is switched off?

    Sound like some kind of pressure release!

    Al
    [ My Cars: '06 A6 S-Line 3.0 V6 TDI Quattro | '07 VW Touran 2.0 TDI DSG | '09 TT 2.0 TFSI Roadster ]
    [ Past Audis: A4 3.0 TDI Quattro S-Line | S6 4.2 Quattro | A4 2.5 V6 TDI Quattro Sport | A4 1.9 TDI Quattro S-Line ]
    [ Past Golfs: Mk1 GTI Cab | Mk3 2.0 Cab | Mk3 VR6 | Mk4 R32 | Mk4 V6 MoFo | Mk4 Golf 1.9 TDI| Mk4 Supercharged 2.0 6-speed ]
     
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