560SL hard cold start, ok when engine warm

[grigorean]

Hello to everyone.I have a big problem with my car.The car will not start when cold, only if I help it with starting spray.I must mention, that when it is cold the engine will run for 2 seconds and after that will shut off, that is why I must help it with spray, for 5 seconds, after that will run ok.The idle it is rough, economy indicator stays at 1/3 from minimum, and the acceleration is a little bit poor.

The car was involved in a big restoration process where the ignition system and fuel system was overhauled, also the engine was overhauled.
Before restoration, engine was running ok, but with some small problems caused by some air leaks

So, I have checked timming, and is all ok, I have checked ignition distributor timming, and is all ok, have checked compression and is all ok.Also the ignition coil, ignition distributor , ignition leads are new, crank position sensor checked internal resistence, signal with osciloscope when cranking, all seems ok.
Fuel pumps are new, fuel injectors are new, fuel pressure tested at fuel distributor and is all ok.Fuel distributor was replaced 2 years ago with one remanufactured by Bosch.
Injectors receive fuel, and spray in very good patern.
Have checked for intake air leaks, nothing found, checked using ISO octane.
Also have checked EHA, Throttle valve switch, Airflow sensor, coolant temperature sensors,and crankshaft position sensor

Really have no idea what to check next.Please help me if you have any idea.