You seem to think it's the injector, but have you checked out the spark plug & the HT lead, have you swapped them with ones from 2,3,4, does the fault stay on 1 or move to the other cylinder?
Exactly the same with the injector, can you swap 2 of the injectors over, again does the fault move or stay where it is?
Have you checked continuity from the Omex plug to the injector plug, never had anything to do with Omex but the Shitreon Paxo boys run them, you have to make your wiring harness, which is the most likely place for a fault, I suspect a bad joint somewhere.
Just as a matter of interest which Omex is it, there are diagrams available online for pinouts
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