your switching from a 2.4l automatic ecu to 2.0l manual ecu, for the automatic transmission to work it generates the voltage elsewhere in the car branches out and go to the speedometer and the galant ecu as an input to change gears, for the evo8 ecu its an output tach signal that goes to the speedometer cluster it does not need to tell anything to switch gears, so when boomslang wired it up they tied it to an output wire, what i did is, i cliped the tach wire from the ecu and used it for my shift light
Bookmarks