Hey guy i got my hatch on the road about 2 months ago and its runnin rich.....real rich.......like black soot out the exhaust rich......now i have replaced a bunch of stuff here it is
o2 sensor, IAT sensor, intake system, exhaust.......converter and all, no matter what i do i even advanced the ignition timing and it wont work.....any suggestions.....
its a 89 Dx D15B2 1.5L SOHC with dual point fuel injection.....i need help guys!

 

I don't know if dual points work the same, or even how to fix it, but it should be similar.

This is just for until you find a permanent fix. I was willing to do anything to not make my driveway black, even if just for a while.

https://honda-tech.com/zerothread?id=1036925

 

have you checked fuel pressure regulator? Maybe the diaphram (sp) failed.