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Is this a upgrade chip thingy....

Discussion in 'A4/S4 forum(B5 Chassis)' started by symun, Jun 12, 2011.

  1. symun
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    symun Member

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  2. symun
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    symun Member

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  3. symun
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    symun Member

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    Sorry about the cock up earlier, trying to post from an android phone........
    I hope the pics are visible now...
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    yep, i presume you have a TDI, its a "tuning box"
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  5. symun
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    symun Member

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    ok cheers mate. yes it a tdi. anyone have an idea what make and if its a good one.
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  6. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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  7. symun
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    symun Member

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    Will turning it down a few notches stop it smoking when booting it.
    I had no idea it was on the car and i presume neither did the previous owner.
    So far getting 50mpg, so i am happy to leave it on.
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  8. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    tuned diesels are always smokey tbh.
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  9. symun
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    symun Member

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    ok, just a bit embarassing when i boot it on the bypass and leave a smoke cloud 007 style behind.
    I know its due a service but am waiting till my missus car is fixed before doing mine.
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  10. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Yeh, thats one of the disadvantages of a tuning box over an actual remap.

    A tuning box just fools with the signals between the ECU and injector pump, and as such gives a very crude delivery of extra fuel.

    A proper remap correctly alters the ECU mapping to provide the required extra fuel where its needed, and not simply everywhere.
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  11. Arrkon
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    Arrkon Midlands regional Moderator Regional Rep

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    That said though, Aragorn. The tuning box i used to have on my tdi avant was a bit more intelligent, it used a MAF input to fuel only when there was enough air to go with it (ie under boost).

    Symun, Turning the dial down a couple of notches should, in theory, stop the excessive smoking. But as aragorn has said, diesels inherently smoke (especially when under hard load), and adding more fuel will make more smoke...
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  12. symun
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    symun Member

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    Cheers boys will service soon then turn it down a notch, i only boot when the family are not in the car and thats getting very rare these days.
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