My 99 civic Ex dies when its warmed up. Car is running rich and won't stay on unless I keep pressing gas and keep RPM above 1000. I took it to autozone and got code for random misfiring. So far I did following but did not help.

replace fuel filter.
cleaned idle air control valve
tested Ignator its its good
cleaned fuel injectors
replaced sparkplugs.

 

A failing ignition coil commonly manifests via the car dying after warm up. Hitting the gas and raising the RPM may help for a few seconds, as you are doing. You can test the coil per the shop manual. Or it is probably due. I consider the coil and igniter routine replacement items (or one should anticipate same) for this generation of Civic.

Buy only an OEM coil for replacement.

Consider replacing the ignition wires with new OEM ones as well.

 

I pulled out igniter and Autozone tested. ITs good.
How do I test coil?

 

Igniter failure manifests by no start. I would remain suspicious of the coil.

Autozone's free online manual has what I think is identical to the factory service manual for testing the coil. It has photos, too. Text from there:

1. Disconnect the negative battery cable.

2. Remove the distributor cap.

3. Remove the black/yellow and white/black wires from the terminals marked A (+) and B (-).

Resistance will vary with coil temperature; therefore all specification were taken at an ambient temperature of 68°F (20°C)

4. Measure the resistance between both terminals using an ohmmeter and compare with the following specifications:

5. The primary winding resistance for the Hitachi distributor should be 0.45-0.55 ohms. The secondary winding resistance should be 22.4-33.6 ohms.

6. The primary winding resistance for the TEC distributor should be 0.63-0.77 ohms. The secondary winding resistance should be 12.8-19.2 ohms.

Also from the H-T FAQ for this generation of Civic (special thanks to Moderator Ron):