i dont know if this will help.
but i had the cold start issues way back when this was started, on stock ecu, i never found a fix for it.
i changed to a Power FC and tuned
and then had a diff prob, whether its from the same issue or not i dont know.
but what would happen is it wouldnt start first go would splutter and die, then be fine next start This is cold start btw.
then when i would be lazy and put the clutch in but not down change it would rev hunt but not stall.
also hot starting would give the same rev bounce.
i had looked around trying to find others having the issue and noticed there is a sensor check on the Power FC looked at it and noticed my TPS was at 0.35v
which is low anywhere from 0.45-0.5v is what you should be aiming for.
so today i adjusted it and it has been near perfect!!! fingers crossed
so maybe you guys might want to check it out.
Like i said it may have no relevence to these issues, ive forgotten the specifics of everyone posting, just my own.
If you guys are running stock ecus you can still check the voltage just need a multimeter, there are a few threads around, you may just need to find the correct wire....
hope it helps