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The power for the injecters is pulse power from the ECM. It is supplied through a relay called a "latch relay" to get it's power from. The relay gets it's feed power from a green fusable link and trigger power and ground from the computer. You should be able to troubleshoot this relay to determine if it's energizing. I'll include the schematic to help you. If this was helpful, please click on the accept button for my answer.