This is a 2-man job, but try this:
- confirm you have continuity to ground on one of the two pins for the female cold start plug
- When a second person cranks the engine (with coil wire removed and inertia switch plunger up), check DC volts on the other cold start plug pin, you will probably 9 to 10 volts. That's good enough.
- Now plug the cold start valve plug in and place the injector into a jar. Put the plunger back down on the inertia switch and crank the engine. The CSV should fire into the jar. If it does, you've confirmed it's oK.
- If it doesn't, try pinching the terminals together on the blue cold start plug, very common for them to get spread apart too far and not make contact with the male pins.
If you know the CSV is working but it still takes a few turns of the starter to get the car to start cold, you are probably very slowly bleeding off fuel through one or more leaky injectors into the cylinders. Can be confirmed by removing all injectors and placing them in glass jars too. Pressurize the system, push down on the meter plate to make them sing, then watch each injector and make sure it doesn't drip afterwards.
You might not see the dripping on a fuel pressure gauge because it happens too slowly. Give it a day or two and you could have a couple of bone-dry injector lines.