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speedo about 20% out?

Discussion in 'A3/S3 Forum (8L Chassis)' started by xCoupexAshx, Jul 20, 2010.

  1. xCoupexAshx
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    xCoupexAshx All Torque

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    [Jul 20, 2010]
    hey there my speedos out wat seems to be about 20% or so. ie if it reads 25mph ur doin 30mph, if it reads 60mph ur doin just over 70mph. makin speed cameras a right arse to go through lol

    anyone heard this prob before? i cnt seem to find out wat it might be. garage is lookin at it tues n reckon it could be the gearbox sensor. any help would be much appliged.

    btw its a 98 a3 1.8t, completely standard. ta
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  3. Sandip
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    Sandip Well-Known Member

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    [Jul 20, 2010]
    What wheels and tyres are you running? Could be that the overall rolling circumference is out
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  4. xCoupexAshx
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    xCoupexAshx All Torque

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    [Jul 20, 2010]
    standard 16" 5 spoke audi alloys, not sure of the tyre size off top me head
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  5. Sandip
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    Sandip Well-Known Member

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    [Jul 20, 2010]
    Just have a quick check to see if your tyres are 205 55 16
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  6. Nilz
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    Nilz Defo worth the wait :)

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    [Jul 20, 2010]
    Sounds like you may have the wrong tyre size on, which will knock your speedo out....
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