The engines have sensor example: chopped, air flow, air temperature, resident of resident, upper camshaft point, turbo pressure.
They give the imformation to the UCE and she is scheduled to act on the actuators based on the table scheduled in factory.
Example: Temperature 90º Revolutions +of 3,000 speed sensor imforma of 120 kh = A caniste valve opening.
Butterfly position sensor in position 5 + air temperature 20º + refrigerant temperature 40º = open relief actuator.
The UCE is the one ordered by the imforma sensor and the actuator continues to urges UCE. If you don't have a 1.5 UCE I don't think that engine works well.
Of all that is what I told you look to see if someone reprogram you and you get more varato.