Are you sure it is running rich? Ie is it a mechanical/electrical problem with the fuel system or do you simply have an odometer problem?I ask as these bosch odometers have soft plastic gears and the can crack (slip) or miss a tooth or two. I have encountered the missing tooth and it made about the same difference as you are talking about.Fuel system, you need to go through the FSM troubleshooting. Need a set of FI gauges for KE injection.Michael