Try unplugging the o2 sensor, and reset the ecu. Happend to me once in my 89 HF CRX with a b16a....like a week ago.

 

P30 Pinout HERE
The Hondata system won't affect the codes at all, it's all inside the ECU. You can jumper out the wires and you're set. It doesn't sound like it's the ECU based on what you found out with the unchipped P30, so it's obviously something else. I'm not sure what he means by "too much voltage", the only way you can get too much voltage is if your charging system is faulty. The injectors get power form the battery and the ECU switches the low side of the injector coil to ground. SO the injectors should be at whatever the charging system voltage is when the car was running, and that's easy to check.
Sooo, you need to get the codes checked.

 

i got it fixed, it was the o2 sensor. thanks to everyones responces.

 

ah ha! knew it


Good to hear you back on the road man..

 

It's not often I'm wrong in the tech section. Sorry for being misleading.