After cleaning the injectors and replacing one of them, i have been experiencing a random issue where the car starts after a long crank. This happens randomly and not all the time.
there is no warning sign on the dashboard
no error in the computer scan.
no petrol leakage.
Fuel pump pressure has been tested with no issues.

i attached a video may be some1 can help shed light on the issue if they had experienced something similar

 

I don't have a definitive fix for you but there are some observations:

-The engine seems to be cranking slower than normal, and the cranking speed seems to vary, i.e. it is not a constant rpm. Not sure if this is started related or something else.

 

Also in your video - you see the blue dash backlight illuminate for a fraction of a second (like it had actually started) and then the light goes out and it keeps cranking until it does start and the blue dash light comes back on solid. It's almost like it thinks it started for that fraction of a second. Might need to have some more in-depth ECU analysis (Dealer/TechStream) done during cranking. I personally would try resetting the ECU (pulling the fuse or disconnecting the battery) - but that might cause other issues as well.

Odd electrical gremlins like these are one reason I don't "play around" with this kind of "preventative maintenance" on mine. I'll do the basic maintenance - but anything that gets into the emissions and ECU I'll hand off to the dealer - and then let them fix any gremlins they conjure up