code 43 Fuel Supply HELP?~~

what can be the problem? CODE 43 fuel supply

fuel injecters?, o2 sensor?, fuel rail?, fuel pump?, or clogged fuel filter?..NEED HELP!!!~

fuel injectors changed
o2 changed

still code 43

cylinder 1 = 200psi
2 = 150psi
3 = 180psi
4 = 200psi

what is the problem?

i have usdm ITR pistons with new rings in b18a 100k :uhoh: :uhoh:

the last time I got a 43 it came with a code 1 also, so I changed the o2 sensor and it was ok. Did you reset the ecu after you changed out the parts? If not you can try that.