Misfire on throttle but not at idle?

[12secondnova]

Like title says. I have a 4.8 in my truck with Holley terminator efi, stock coils, and msd plug wires. At idle and light throttle(like 30%) it runs perfect but as you give it more it starts to sputter and pop which gets worse the more throttle you give it. Computer shows nothing is wrong or out of the ordinary with the tune. Wires are clear and clean, all grounds are good. Ran fine before. What would make it do this? 1 coil going bad? ?? Any help or suggestions is appreciated!
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