Cold start problem

I've had the same thing on my 82 SC for a long time so I hope when "dano" finds his solution he will post it here so I can try that on mine first... (I live with it because I've got so many other things to fix that I haven't gotten into determining the cause yet though I'm certain it's in the fuel system).

I've also got 2 Bosch K-Jetronic manuals and the troubleshooting charts point thusly (and I quote, sorta - can't draw the charts here in text):

Poor idle - cold =
-Airflow sensor -or-
-Warm-up regulator -or-
-Cold start valve -or-
-Thermo-time switch -or-
-Auxiliary-air device -or-
-Pressure actuator -or-
-Throttle switch

Well, I guess that didn't help much, but it's better than replacing/testing everything, huh?

More thoughts --- seems on further checking I actually have 4 Bosch K-Jetronic books (where did I get all this stuff? )

A little reading leads me to believe that my problem on my 82 SC (which I think is identical to yours) points to the warmup regulator. The manual seems to indicate that the Cold Start in combination with the Thermo-time switch is really limited to only the first few seconds (maybe 10 or so --- it's not real clear on the length of time) of the startup period. Since mine and, I think, yours, starts instantly every time (mine does, no matter what the weather) but then coughs and spits for up to about 4 minutes afterward (depending on the weather) the manual seems to point to the warmup regulator as taking over during this period of time until the engine gets up to full operating temperature and warms up the walls of the intake tubes and cylinder walls so that the right fuel mixture now reaches the combustion chamber and everything runs right. The Warmup regulator also works in conjunction with the Auxiliary-air device (haven't looked in mine yet to see if I have on of these though I remember one on my 74).

Anyway, that's what I can offer without just copying the whole book in here (can't anyway, you know, copyrights being what they are and all ha ha )

Good luck and let us all know what you find.