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Cold start injector is not putting out. I have replaced everything thermotime switch tried several injectors, checked all wiring and still no go. The injector shoots if I connect one of the main 6 injector plugs. Could this be a O2 sensor failure? AFM? Throttle switch? Temp sensor? Let me know thanks, Ciao.

It really is just the the thermo time switch and the cold start injector that operate that system, my guess would be a bad connector on either the switch or the injector, there are a few tests out there for the wiring. I know a friend went through this and it ended up being a connector. Good luck.