How to find bad injector?

[stevesparts]

1st: dose it run rough when warming up or after? if its after shes all warmed up, pull off the valve cover and look at the cams to see if they are starting to go.mine had a miss in it and the cams started to go but it ran fine going down the road rev. but it ran like sh#t when sitting at a stop idling. so it might not be a injector. just some thing else that it could be.