P_uk:

Regarding the EHA (Electro-Hydraulic Actuator):
If the EHA is not functioning for any reason there will not be any mixture enrichment for starting, post-start, or warmup. There are a few obvious things that would cause the EHA to not function, or to not receive an enrichment signal.
1) Connection between EHA and ECU is unplugged, or broken.
2) ECU is not working.
3) An air or water temp sensor is sending a "hot" signal when cold.
4) The air-flow plate potentiometer is not sensing plate movement, or is not providing a signal to the ECU.
5) The throttle switch is disconnected, or not signaling correctly.