1984 190e 2.3

[Pilotx1]

I am trying to diagnose a rough running condition with my car Ive checked all of the ignition system and it came out fine. Now I am looking at the fuel delivery system. Could anyone tell me the idling fuel pressure, the key on engine off fuel pressure, and the pressure after the key is turned off? When I tested mine I got about 40psi key off and 90psi when the engine is idling and also with the engine off and key on. Are these pressures normal? They seemed kinda high to me. after this the next thing on my list to check is the injectors which as far as I can determine from the maintainance records are still the original factory ones. The car now has about 111000 miles on it. Any information or suggestions are greatly appreciated.
Thanks