Hello
New to the group
I am trying to help a mate get his 1980 280E Running.
It's been stood for 2 years.
We can make it run with start gas so the engine is OK.
We seem to have a CIS problem.
It's had a new pump and filter.
I bought a quality gauge and have made some adapators to check pressures.

From the pump direct to the CIS is 5.8 Bar 85 Psi. I think this is ok ?

Checking on a feed to the injectors its 2.1 Bar 31 Psi. I think the injectors open at 40 something Psi so this is low I think ?

Where do I look next?
I know there is a pressure adjusting valve.
And some valves I don’t understand their use, like the Warm up Compensator and the Pressure Damper ?

This is a UK version and I think won’t have some of the features of the other versions.

Any help appreciated please.

Thanks