180kms will be inforced.
No speed sensor will also make the motor run slightly rich at idle and slightly lean higher in the rev range.
It will also rev cut lower then what it should, 7200rpm v's 7750rpm (approx rpms)
And the bloody check engine light will come on from time too time, depending on your driving style.
There is a way to find the speed sensor, on AE86's its on the back of the cluster, even the Aus-spec ones have it
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Cheers
Steve