my 4x4 cos is overfueling, is there any known concerns?

 

Coolant Temp Sensor Checking - info courtesy of Simon @ SECS
1) Ensure ignition is OFF.
2) Remove rear of ecu plug cover and insert plug back into ecu.
3) Turn ignition back on (do not start engine)
4) Check resistance between pins 29 and 11. Should be 800 to 5000 ohms (depends on temp). If outside this range, check sensor and/or wiring.

 

coolant temp is the blue sensor at the back of the head on the inlet side

 

could also be the map sensor or the fuel regulator! what spec engine you running?