350zTotal

I've replaced all 4 O2 sensors and reset ECU several times.

Car is not tuned.
No engine modsStock cats+downpipesTomei exhaust
'07 350z

Heel Til I Die

iTrader: (2)

If all 4 sensors are good, then some other possible causes are the harnesses or connectors, fuel pressure, fuel injectors, or intake air leaks. Easiest thing would be to check for any shorts or breaks in the wiring or harnesses.

350zTotal

Do the sensors look good based on my obd reader info?
The fuel trim is higher on one bank but I read that's normal. Doubt it's a fuel pressure issue if fuel trim is still happening.

What should I do?