"malfunctioning or defective fuel system"



The only recent changes are to 290cc injectors, and hondata set for them.

What/ where to check? I'm guessing maybe I need to clean/ balance/ blueprint the injectors.....

 

From what i read, and in my own exp. Its the 02 sensor. Try resetting ur ecu. I get code 43 from long (20min drives+). And when i turn the car off, it resets. ...Hope this helped. But most likely its the o2 sensor

 

I still get a code 43 and I have done the following:

-Got my injectors cleaned and balanced
-Replaced fuel filter
-Replaced O2 sensor
-Had my main relay re-soldered
-I think my fuel pump is ok, it is the Holly 255 and is relatively new.....maybe it is faulty though.
-Fuel pressure at idle is 48 psi
- I am running Hondata Stage 2 with boost and recently upgraded my intake manifold to the JG Edelbrock one...maybe that screwed everything up.

Please help