On a coldstart with the coldstart injector connected my car start very fast but dies instantly. After that i need to start is for like 3 seconds. When i disconnect the cold start injector i need to start for like 4-5 seconds and keeps running it doesn't die.
I've put on a new cold start switch. I also think the car is running a little rich, sooth on the exhaust and it smells. Would a setup solve all the problems?

Thanks