I have a 1999 Ford Mustang GT and its sluggish when taking off? What could be the issue?

Its sluggish on power usually only happens in the first 3 gears between 1800 and 2000 rpms. And also when I give it gas at idle it stays at 2000 rpm before idling down. 178k miles. Just changed a faulty o2 sensor. So what else could possibly making it do this. Probably plugs and coil on plugs need to be changed? If any advice it would greatly help thanks

Your issue is that you were dumb enough to but a ford. Should've went chevy, srt, or bmw.

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Good I have a 1999 Ford Mustang GT and its sluggish when taking off What could be the issue