Greeting Forum Members,

Today I tested the fuel pressures on my poorly running 1985 280sl.
I now need help in interpreting the results, CIS Kjetronic II system.
My control pressure at idle of .5 bar @ 25 degrees Farenheit I think is correct as the acceptable minimum.
My system pressure @ 20 degrees Farenheit reads only 1 bar.
The system pressure should read 5 -5.6 bar engine at idle warm or cold.
My control pressure topped out at 1.2 bar with the engine warm and begining to die due to running rich.
The control pressure should read 3.6 - 4.0 bar with the engine warm
and warm up compensator stabilized.
System maintains good constant rest pressure(engine off).
Could a worn or damaged system pressure valve be responsible for these poor pressure readings and/or does this look like a warm up regulator problem?
I suspect the former.
Any experienced help with this matter would be most appreciated.
I'd hate to order a part I don't need.

Thanks,

Knarf

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72 350SL #69
73 450SL Parts Car?
78 450sl Parts Car
79 450SLC - Sold
1985 280sl
87 190E 2.6 - Donated
90 300E-Junked
97 E420