im having a problem with well both of my clusters now. i was swaping my ex cluster for a ferio km/h cluster and automaticly when starting the car the speedo shot to 40 km/h. was told to change the speedo gauge so i did from my old ex cluster which was working fine. when after changed still same thing happened. and now i put the ex cluster back togather with the speedo gauge that was in it before and plugged it in but then what do you know it then shoots up to 25 mph. wtf is the problem? please any help