car feels cloggy, spark plugs causing it?

[phoenix6]

Well last week I had a cylinder 5 misfire, replaced the coil pack which fixed it. Way before all of that though Ive had an issue with the car not giving out much power. It feels very sluggish on acceleration. It feels clogged or just unclean internally and from 1st to 3rd its just not giving me much. Anyone have any ideas on how to check whats wrong? Will the spark plugs not being gapped at a certain number cause this? I just installed them out of the box, about 4 or 5 months ago.