how do you tell TBI injectors apart? I'm lost and even have a pic

[stackz]

You can send them out to be cleaned and flow tested. Then scribe an equivalent number on them so you can readily recognize them when mixed together.

I mean, I guess will just mark them myself real quick with a razor blade before I forget what they came from. by the time I pay for shipping/flow test, etc I might as well just buy a new one.