Hey guys I'm back, decided to create a new thread since the last topic didn't really turn out to be my issue. So right now I'm having an issue with my 05 G35 coupe running very rich. The STFT is almost constantly at +25%.
Things I've done:
Repaired any exhaust leaks
Tested A/F sensors (B1/B2 good according to FMs)
Tested HO2 sensors (B1/B2 good according to FMs)
Used fuel additive (Gumout) to clean fuel system
-(X2 in a 3000 miles period)
Obviously still running rich since I'm here.
Things I've noticed:
At idle both banks now go into OL_Fault when the ECM tries to trim it back to 0%.
LTFT maintains +9.4%
Throttle position at idle is 3.5%
DC cold air intake
Cat back dual exhaust
Any help is appreciated. TIA!