Rpm's bouncing @ warm up then my PGM-FI light comes on

[Pister]

I changed my o2 sensor, to fix this problem , but nothing.
i know to look for the codes off my ecu, but dont know they mean.
you know what they mean, or have a link?

[Jareds 89 LX-i]

Which code are you getting? The list of what each code means is in the FAQ.... https://www.3geez.com/showthread.php?s=&threadid=185

Most likely the EACV (electronic air control valve). Common thing on EFI 3geez

[Mike's89AccordLX]

Try your ignition module. My brothers tach bounced all over the place and I replaced his ignition coil, cap, and ignition module. And that took car of his tach.