Low fast idle on cold start causing charging problem

[Normand]

Thanks. I understand the problem. It may take you a while to find a solution, but the first place that I would look is at the battery. Make sure that the battery cables connections are clean and tight.

All cables connections are clean and the charging system is working perfectly after I increase RPMs to engage electronic regulator in alternator...
The problem is: low RPMs at cold start (peak at 1450 then 1100) ...causing regulator to stay OFF untill I increase RPMs over 1600 for fraction of second.
Kind of air/gas mixture adjustment or injectors opening time problem at cold start... but don't know where to begin with that.

Normand