Ive been having troubles with it (My cold start valve) for the past few months (first time Z owner), I bought a new one and installed it, had my friend fire the engine up and it just sprayed fuel out of where the line connects to the valve and constantly dumps fuel. My only guess is something is up with ECM or something (still learning about this vehicle). Any suggestions on how to fix this? Thank you for any help.

 

Welcome to ZDriver!

If it leaks at the hose connection, you need to clamp it down better.
As for the constant spray, check the thermotime switch (detailed info here and in the FSM).