P301 P1399 '99 Civic Coupe EX 79100 miles 1.8 liter auto

Hey guys,
Thanks for your help.
I have an intermittent misfire in my #1 cylinder. It usually happens in the morning on the way to work.
Typically I'll be able to feel a little rumble in the steering wheel when I'm stopped at a light. Then I drive it like that for about 10-15 minutes on surface streets. After that I get on the Freeway for about 10 minutes and when I get off the freeway is when it's usually the worst. At that point it often misses so bad that the Check engine light comes on and flashes. When I start moving again the flashing reverts to a steady light. Then I park it for the day while I'm at work and it's fine when I start back up.

I had it read once while it was on and it showed a 1300 misfire in cylinder 1.

Going for the most easy first, I swapped the plugs in #'s 1 and 2 but it did it again. I thought it felt different, but when I went to checker, it still read Cylinder 1 as the baddie.

So what do y'all think? I'd appreciate any help you could give me.

I also changed the o2 sensor with no improvement.

I replaced the plug wires after I tore the wires loose trying to remove them so I could pull the plugs.

I pulled off the Distributor cap but it looked fine to me with no buildup in any of the contacts that was abnormal. 1 looked no different thatn 2, 3, and 4.

Again it's a '99 Civic EX coupe with automatic transmission and 79100 miles.