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A wiring problem, blown fuse, bad computer or a security problem can all cause this. Here's a PIC of how the injector should look when firing good.
Thanks for your question and positive feedback,
Well, have you confirmed that the injectors are not firing?
Check for a strong blue spark at the plugs when it won't start. Check fuel pressure and volume with a guage too. Also, I can still help you after you have ACCEPTED too.