Misfire under 2.5K

I since yesterday my car has been missing under 2.5k in 1st and 2nd gear but only when I push the accelerator down to go. If I criuse in netural or waiting on the light to change it idles fine @ 700rpms. No matter how I drive once I pass 2.5k the car takes off and drives normally. Any ideas.

Checked or replaced:

Spark plugs, Wires, added 89 fuel, check dist bolts made sure the were tight.

UPDATE: Also If I’m just sitting and rev the engine it doesn’t miss then also.