123 hp 138 ft-lbs
injen short ram 300zx fuel filter walbro 255 fuel pump 3’ custom exhaust new coolant temp sensor
from 4000 rpm and up the power band is really rough and the entire power band is lean throughout with really lean instances at 4250 and 4750
anyone know what could be causing this problem?
Its normal for it to run lean. But it is low on the HP side of things, it should put down 140+hp with an exhaust and intake. The roughness in the powerabnd is probably from the ECU pulling timing becuase the engine is Knocking.
Check base timing, for the source of the knock.