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2017 ZL1 with H/C/LT and 2300. Cylinder #3 has started reporting misfires. It is fine at idle and heavy load, issue exists at light loads. Issue is worst when cold and goes away when fully up to temp. Have already:
replaced plug
replaced plug wire
swapped coil pack
inspected under valve cover (didn't observe anything like cracked springs or hot spots on top of valve, everything's tight)
Take a listen while watching this log go by and see if you can come to a conclusion:
Do you run E85? We had a new Z06 few months ago with heads, cam and whipple that acted really similar and it had really dirty injectors. We cleaned them and them and one failed in the machine. Replaced that one injector and its been good ever since.
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Bad injector, lifter, or? 
