Lifeless engine

I have a W126 280se 1985 with KA-JETRONIK fuel injection.
I rebuild the whole engine and all marks are aligned like they should
Bud it refuses to run…
I have tried everything, it is getting fuel, and getting spark,
seems like it is getting not enough fuel, or not enough spark?
I can get it to spit and sputter bud that’s all!
Maybe the fuel injection? How can I test it? Does anyone have any ideas where I should be looking?
This car ran perfect until the rebuild and one time it just wouldn't start..
There is a screw on top (allen 3 mm) to affine the richness, what is the initial position of that screw, a guy who pretended to know, F….it up, so maybe..

Please HELP!!!

Thanks

[Benzmac]

I e-mailed you on this because you posted this to my e-mail.

From now on, just post here and I'll try to get to it.

Thanks for understanding.

Hi guys
the problem was a bend intake valve!
Probably I did something wrong before mounting the head and turned the cams separately so that one valve bended the other…and needed to be replaced!
Now that is resolved, the engine runs, but to fast (1500 rpm)
I tried everything but cannot get a lower idle, what to do?
Any suggestions?

Marexke,