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Hello, my name is***** you already replaced injector and coil the only things left are wiring to injector/coil, PCM, or internal engine problem such as valves. Considering restarting vehicle helps sometimes, this would point toward the PCM. If PCM was problem it would stop firing coil or injector. You will need to monitor injector and coil power/ground during problem. If either of them are losing signal verify wiring between component and PCM are good, then replace the PCM. Let me know if you have more questions or if there is anything else I can do to help .Thanks.