Thanks for your reply.
OK, I sort of get it.
Now, lets say I turn the screw for the idle control mixture to make it leaner (assuming I am running rich at 32% average duty cycle).
Would doing so will make the duty cycle go to 50%?
(Engine at normal operating temperature and idling)
If it does, then I assume that the closed loop control will keep it dancing between about 45-55%.
I am just trying to figure out whether I am running rich or lean, and how to adjust it using the duty cycles from the diagnostic terminal.
By the way, if you happen to have the list of codes-duty cycles and what they mean, please post it or send it to me.
I find the codes but there is allways a note stating "for vehicles from 1992 and newer.
Mine is a 1986 300E

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1999 Porsche 996 Carrera Convertible
1994 420E - SOLD
1986 300E - SOLD, what a car
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