I have found a way to keep the swirl valves open that will not affect the ECU.
With the engine off the valves are fully open and close when you start the engine.
the fail safe position for the valves is in the open position.
In order not to feed the ECU with any errors I left the electric plug connected to the drive motor.
I took the C clip and plastic washer off the drive motor arm at the motor end and pulled the connection arm out of the drive arm.
I replaced the washer and clip on the linkage to the swirl valves.
Then I put a cable tie on the linkage and pulled the arm to the open position and fixed it in place on part of the drive mount.
Keeping the valves in the open position.
There are no warning lights on the dash and the car is driving smoother.
We have done around 200 miles on about 1/4 of a tank of diesel, but I will tell better when I fill the tank up.
Paul in Cyprus