It seems that while you may have a new cold start injector, it still isn't passing fuel when it is supposed to. The cold start system comprises of 4 components, and EACH must work, in order for the CS injector to work.

1) CS injector.........yours is new, so skip this

2) fuse for the CS system..........check the fuse panel for a bad "cold start injector" fuse

3) CS start relay.........looks like a square box, usually along side the fuses..............there are many, so you have find out which one it is.......I don't know

4) Thermotime switch (TTS)...........usually located next to the water temp sender unit........I find them near the thermostat housing

The MOST often problem is the TTS going bad, so there is where I would check first.