Is there any simple test i can perform on used injectors just to make sure they work before i put them in my car? TIA

 

I tested mine with a 9v battery just to be safe. They should make a distinct clicking sound and should be heard clearly. Just hook two wires from the battery to the injectors and once you touch it, it should click right away.

 

polarity doesn't matter right?

thanks

 

won't the injectors get damaged without fuel running through it? is the 9v test safe?