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Juddering 2.0 TDI

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by P Crr, Oct 21, 2009.

  1. P Crr
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    P Crr Member

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    [Oct 21, 2009]
    My car was fine till the other day when I filled up at local supermarket. Now car judders under heavy accelaration at around 2500 rpm and above. Car starts fine. No lights on. Car is a 55 plate with 83K.
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  3. Six-speed
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    Six-speed New Member

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    [Oct 22, 2009]
    Funny old thing. I refuelled at Sainsbury's last time I filled up and it ran rough and juddered. Next refill I stuck in some inector cleaner and went for a 'branded' fuel. Much better, could've been a bad batch I suppose, although around now I understand that the frost-protection of the diesel is changed by the manufacturers for winter driving. Perhaps that was it.

    Hope that this helps.
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  4. Six-speed
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    Six-speed New Member

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    [Nov 6, 2009]
    Now emptied a tank of real deisel. Engine much better, must keep away from that Sainsbury's chip fat!!!:doctor:
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  5. TripleD
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    TripleD Audi Novice

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    [Nov 6, 2009]
    Nice useful post! My A3 2.0 TDi is hesitant from 2.5k up to 4k, filled it up with £55 of Tesco's Value diesel the other day, so I guess that's the cause! Was thinking something was on the way out! What cleaner did you use?
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  6. Six-speed
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    Six-speed New Member

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    [Nov 6, 2009]
    Redex diesel cleaner, bottle is apparently enough to do two full tanks, but I just whacked the whole lot in!

    Probably worth paying the extra 2p a litre for Shell or whatever.

    Cheers
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  7. Six-speed
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    [Nov 6, 2009]
    Redex diesel injector cleaner. Just stuck a whole bottle in.
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  8. M7R
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    M7R Type Approval Engineer,

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    [Nov 12, 2009]
    I use sainsburys or mainly asda in my tdi, and it seems fine on it, you might have just had a dodgy batch. but i will say that every 10k or so (every 4 months lol) I run some miller +4 through it as thats stuff seems pretty good and aload of the lads on cgti swear by it
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  9. Good 2 B A Gooner
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    [Nov 12, 2009]
    Sorry to butt in guy's :think: What is miller +4?!
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  10. M7R
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    [Nov 13, 2009]
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  11. captaintricks
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    captaintricks New Member

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    [Nov 14, 2009]
    did the problem get fixed ? I had a similar problem on my a3 and it got progrssively worse and the fix was an injector part (after going round the houses and being told different stuff by different mechanics)
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  12. P Crr
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    P Crr Member

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    [Nov 14, 2009]
    Bottle of millers additive done the trick straight away. Ran tank down with no problems after adding. Next fill I used Shell V Power. Still no juddering.
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  13. TripleD
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    TripleD Audi Novice

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    [Dec 23, 2009]
    filled up with diesel from Asda and it was fine for a couple of tank fulls, then had to fill up at a sainsburys, it's juddering like mad again!! Somethings gotta be wrong, i.e. MAF or something. Just put £45 of Shell V power Diesel, will see what she's like on the trip home.
    Failing that it's booked to visit Audi tomorrow!
    #12

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