I need to lower my ehaust co2 value. I have put on both stock cats and the air pump and the value went from 7.3 to around 5.

So i guess the car runs rich but i dont know why. The watertemp gauge dont work, can it be that the ECU think the engine is still cold and feed more fuel? Cause the watertemp signal goes through the ECU right? Also the watertemp sensor on the intake is not hooked up now.

I dont know why the watertemp gauge dont work, it did in my earlier car ( i have swapped engine and ECU to another car)

The boost gauge isnt working either. So can this be a ECU problem?

Both cars are TII -87´s

Thanks
/Kalle