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Hey mate,
Yep you are on the money, a misfire is usually going to be either your plugs or coil packs. How many ks has your car done. Is it a v6 or v8? Have your plugs been replaced?
Why would you ask a question you know the answer to? A misfire has got to do with ignition, so why not go spend 25$ on plugs an see if that fixes it? If that doesn't, check for a difference in resistance in the leads. If that doesn't eliminate it u can start looking at coil pack
the reason for my question is that it only happens when i put the foot down
it seems fine at idle this is why im a bit unsure
Alloytecs have no leads mate. Best to change plugs to start off with then see how it goes, if that doesn't fix it it'll definately be one of your coil packs. A scan will give you an idea of which one is buggered.