Help: Stock 2015 Mustang 5.0 goes lean and wont run. Log included

[regorih]

Im trying to figure out whats wrong with my buddies 2015 GT 5.0. Its 100% stock, only have free flowing factory pussy cats.

Currently it started to to full lean and stops running and we cant figure it out. Does anyone have any suggestions>?



2015 mustang street.hpl

2015 Mustang 5.0 lean (Rev 0).hpt

[mstang_man]

Im trying to figure out whats wrong with my buddies 2015 GT 5.0. Its 100% stock, only have free flowing factory pussy cats.

Currently it started to to full lean and stops running and we cant figure it out. Does anyone have any suggestions>?



2015 mustang street.hpl

2015 Mustang 5.0 lean (Rev 0).hpt

I would check the MASS AIRFLOW meter and throttle body, make sure they are clean no oil residue, dirt ect. there should be no reason for 65% STFT if the car is absolutely stock except for the cats. Cats would not make a huge change like that.

[small tuner]

Bad fuel pump

[regorih]

I swapped the mass air censor with no change .

Small tuner, I will be looking at the pump now. Do you know a good way to monitor the fuel pressure?

[mstang_man]

I swapped the mass air censor with no change .

Small tuner, I will be looking at the pump now. Do you know a good way to monitor the fuel pressure?

pressure drop across the injectors, fuel rail pressure sensor