1989 Ford Probe Engine misses

The probe failed state emissions, the readings were as follows, on idle the co% limit is 1.20 the reading was 0.13 pass, on idle the hc limit is 220 the reading was 45 and it passed, at 2500rpm the co% limit is 1.20 the reading was 1.82 fail, at 2500rpm the hc limit is 220 the reading was 382 it failed.
I pulled the codes, all ok, I can feel the high rpm miss when it's in park, idleing no miss, and if I put it in gear with the brake on I don't feel a miss when I take the motor up to 2000rpm, same as in driving, it's smooth, no miss.
What would cause a miss when it's not in gear at the 2000 to 2500 rpm range?