What are some signs of a leaky injector? Currently running top feed 72lb injectors on a SR. The car seems to be running very rich periodically. There seems to be a tremor every once in a while. Just want to add that the car's romtuned and as of right now it's running smoothly on the dyno.

Are there more obvious signs of an injector leak?

What are some tests that I can do in order to detect an injector leak?

Thanks guys.