speedo

[twaiter]

has any one noticed that your speedo is out by around 3mph at all times? i noticed this with the sat nav on.
its kinda frustrating!

[macdad]

Yep you'll all find that your cars speedo is around 3mph faster than your actually travelling.

[sshooie]

there is an allowed tolerance but they are not allowed to read under, never really noticeable until the sat nav came along.

[twaiter]

yeh but 3mph is alot! surely it shouldnt b tht bad. i had a 1992 starlet where the speedo was more acurate!

[sshooie]

It should be a % not 3mph all the time.

[Big Sig]

yeh but 3mph is alot! surely it shouldnt b tht bad. i had a 1992 starlet where the speedo was more acurate!

Its a lot at 5mph but not at 70mph! They cannot under read by law so they all over read a little.

Also, I bet it wasn't!

[byebyeitsagsi]

They purposefully over read, the speed sensors send the signal to ecu which is told to slightly exagerate the readout. Which is smart as its a point saver