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Maybe the problem is not the Calum RT ECU.
Have you verified that the IACV is functioning correctly? If it is not, idle will be erratic and stall-prone until the engine warms enough. Since the IACV allows bypass air to enter the intake (which would affect the A/R value), I would consider this a suspect until ruled out, otherwise you may be just masking the problem.
Darrin
And we have a winner
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I checked the IACV and it was not connected properly, after fixing the problem I have around 13.5:1 cold then when it gets warm it goes to 14.7-15:1 ...
Thanks everyone, and at least I know now where are the parameters for cold start, and that they are not really degrees..!