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Hey guys I have a fresh build going on. Pulled an L76 from a running G8 and swapped my V6 G8 with the new powertrain. While the engine was out we did a cam and stall converter then put her back in. Now that the car was going to be tuned after startup Cylinder 1 is not firing as it should. We tried changing plugs, wires, coil packs and injectors but no matter what combo we used Cylinder 1 remained the problem. Note the engine bay harness came from a crashed vehicle. Any ideas or help would be greatly appreciated!
 

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For sure you know the valve action is correct (full stroke open an close for each) ? The compression reading is good ? If all OK, is the 12 volts showing up at pin D of the coil connector as well as a good ground reading from pin A ? Is 12 volts showing up at pin A of the injector connector?
 
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