hi all!!
just fitted a new electronic speedo and am trying to calibrate it
but to get a calibration code, its asking me the number of pulses per mile/kilometre from the ecu???
sorry forgot to say im running a 4x4 cossie.
i havent got a clue, can anyone please help?

 

I guess this is if the vehicle comes equipped with electronic speedo as standard so you would be able to obtain this data, Sierra's diden't so will have to try and work it out another way by the gearing etc and then convert that info.

Martin

 

It's dead simple, the first thing you need is a input, there are various ways to do this, you can tap into a abs sensor for a reading, count the number of teeth on the abs ring, then times by the revs per mile of your tyres size, eg 30 teeth x 800(revolutions per mile), would be 24000.
The other easy options are to mount a hall effect sensor, same type as crank sensor, to read something like the bolts on a drive shaft joint, if say 6 bolts simply times 6 by the turns per mile, TVR for example mounted a ring next to the cossie diff to give the reading.
I don't know about your particular speedo(make) but on some there is a feature for scaled input, pressing a button(on the speedo) at say 30mph and 60mph that can be got from a sat nav.
The zetec crank sensors are nice and cheap and do the job, just make bracket to mount.
tabetha

 

ive worked it out to be 588 revs per kilometer.now its just getting the number of teeth on the abs ring???

 

Just count them, mark one with white paint then count, otherwise you lose track easy!!
tabetha