is there anyway of just cleaning out the fuel rail? and how do you remove the injectors to test them?

 

If other than a fuel injector service, say you want to scrub the fuel rail for some reason then get a cleaning brush for say a gun bore. No biggie just find the right size and go. As far as testing them how do you mean. If you just want to test resistance just take of the connector. If you want to check spray pattern then you would just pull them up with the fuel rail but remember that then there is nothing to hold them on.