you really need to start from scratch - and look at how it was installed.
Go over every nut and bolt of the installation.
Read the directions over and over till it's understood.
( you are complaining about cold starts - well they take the longest to learn ) you need to get it running warm and then the cold starts take care of themselvs
What fuel system are you using? how are you getting fuel to the tank?
what size if the supply AND return lines
are your efi boxes near the ignition at all?
what coil? if stock did you ground the noise filter correctly?
power? direct to battery?
I had mine on over a year and a half - I had a few bugs to work out in the beginning but it has been running strong for over a year and a half now with no issues
