hi, iv just bought an escort combi with a 1.8 ZVH but the speedo is very out. 20mph on the clock is about 30, 30 on the clock is about 40 and thats all i have worked out so far. is there a quick fix? im assuming that there is a sensor on the flywheel that wont match the dials but that is a pure guess!? also the rev limiter reads half what it should do. the old owner mentioned maybe fitting dials from an EFi instead of the MFi dials that are in there now??

also, any common problems associated with a 1.8 ZVH? just so i know what to be looking out for.

thanks for reading, sam