Originally Posted by dreamer1uk
A bad tach is usualy a sign of a bad ICM. There about $150-ish to buy new.
For us new guys...ICM means Idle Control Module? If that is what it is, I looked in both Chilton's and Haynes Index and did not find it listed. Where is it? My tachometer does not work either, and I checked the fuses. Still working on figuring out what color wire goes from the tach. The module that plugs into the coil packs, it has three wires...is the tach wire there? I am guessing the tach wire has to go to the coils, right?