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Injectors cutting out

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Old Jul 17, 2022 | 05:08 PM
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Default Injectors cutting out

I have an LS1 from a 2004 GTO...wiring harness and PCM. I have it running and it idles and runs fine to about half throttle. When i load it up, the #3 injector looses the trigger signal (injector stops working). If i continue to load it with more throttle, I loose #5 and eventually #'s 2,3,5,8 at full throttle. They work fine when i let off the throttle and all is well until i load it up again. Does this sound familiar to anyone?
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Old Jul 17, 2022 | 09:21 PM
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Check ALL connections and grounds. Bad connections will cause issues like yours
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Old Jul 18, 2022 | 06:40 AM
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Codes?
Actual signal loss determined how?
Injs fresh?
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Old Jul 18, 2022 | 10:14 AM
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I listened to the injectors with a stethoscope and could here the ones that stopped "clicking" when the cylinder went dead. I then probed the harness of the suspect injectors and saw the light stop flashing when the corresponding cylinder went dead. I do have wiring schematics for the engine and am going to check wiring & connections. I wasn't sure if this had something to do with cylinder deactivation or if it even has it.

Thanks for responding.
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