Bingo! The Idle Valve Hose on the air side was on, but split down the entire length of the nipple. This is odd since it was a new hose from Autohouse AZ.

A Massive Vacuum Leak it must be.

Unfortunately, all local European part stores are closed and I will have to wait until tomorrow.

PS2CHO - thanks for the insight. After I change the hose I will fire it up and confirm good operations. Also, after that I will change a few more variables: new Injectors, insulators seals and o rings and used but new looking Fuel Pressure Regulator. Then I will attempt to address duty cycle with a volt meter.

If you know of any good references for the volt meter ratio adjustment, please pass it on.

Again, thank you PS2CHO.