Hi all

I have an issue with my fiesta, it had a 1.7 swap which was working like a dream, it was then swapped for a cammed 1.7, the engine was the only thing changed, ECU, loom & gearbox were all the items I already had on the car however since its all been put back together the speedo isnt working, I've swapped the sensor over to no avail the clock test shows all needles working fine but no reading whilst moving, does anyone have any ideas of what else to look for to see what could be causing this?