have tried everything,last hope,any advice. running lean red top sr

[driftiteasy0313]

hey guys i have searched like crazy and no answer.i am running lean out of boost and under boost its around (14-15.5 ish) at all times.i know this under boost is super lean. i have replace my fuel pump,fpr,switched out ecu's,checked fuel pressure and vacuum leaks and still doing this.my sr engine is completely stock.i have intercooler and piping 3" turbo back exhaust.i have the wideband hooked up through an o2 bung in the testpipe after the down pipe, and an apexi neo hooked up.is it bad to have my wide band hooked up at my test pipe o2 bung?is it too far away and giving a bad reading possibly?any way to possibly check the maf? please hit me up if you have had this problem or fixed it or if you have any input.i am running out of hope and need to fix this cause i am driving 300 miles on sunday and i dont wanna ruin my baby. thank you in advance guys.

[Killa_D]

lol your running lean because your pushing 15.5 lbs of boost on a stock motor and your maxing out your injectors lol try running the stock 7 or maybe 10 lbs and see if you run lean.

[driftiteasy0313]

lol your running lean because your pushing 15.5 lbs of boost on a stock motor and your maxing out your injectors lol try running the stock 7 or maybe 10 lbs and see if you run lean.
oops sorry i meant those numbers as air fuel ratio 15.5:1 not boost, my mistake haha.I am running stock boost.

[cotbu]

Do a free air calibration on the wideband or turn it on, engine off, after about 10 or so seconds it should read lean, air or --- etc. If it still says 14 - 15.5... whatever your sensor is probably bad, you installed the Wideband wrong or it's broken.
P.S. If you don't go into boost and drive like an idiot, you can still drive your car.

[Norty]

I would def check the wideband sensor itself for sure. I had the same problem a while back and realized that the sensor had been fouled because of a turbo i blew up a while back and the sensor got oil from the turbo baked to it. It was really obvious when it was saying right around what yours is at idle and I had 740cc inj and a z32 maf on a stock tune and you could smell the raw gas coming out of the tail pipe. Got new sensor and works fine.

[driftiteasy0313]

oh ok sweet, i have never thought of a fould wide band sensor.any suggestions if its working properly??

[deukalionS14]

isn't his wideband in the wrong location anyway? the test pipe bung is too far to get an accurate reading from what i've been told.

[fishhouse]

isn't his wideband in the wrong location anyway? the test pipe bung is too far to get an accurate reading from what i've been told.
itll be alright as long as theres no exhaust leaks before it. if there are exhaust leaks before it, even small ones, itll read lean.

[Norty]

all the widebands i've used have to be a min of 12-18" away from the turbo because the turbo gets too hot and kills the sensor

[deukalionS14]

oh, ok thanks for the info

[steve shadows]

hey guys i have searched like crazy and no answer.i am running lean out of boost and under boost its around (14-15.5 ish) at all times.i know this under boost is super lean. i have replace my fuel pump,fpr,switched out ecu's,checked fuel pressure and vacuum leaks and still doing this.my sr engine is completely stock.i have intercooler and piping 3" turbo back exhaust.i have the wideband hooked up through an o2 bung in the testpipe after the down pipe, and an apexi neo hooked up.is it bad to have my wide band hooked up at my test pipe o2 bung?is it too far away and giving a bad reading possibly?any way to possibly check the maf? please hit me up if you have had this problem or fixed it or if you have any input.i am running out of hope and need to fix this cause i am driving 300 miles on sunday and i dont wanna ruin my baby. thank you in advance guys.

If you are able to get your car down to LA/OC area I can arrange a diagnostic check up

I think the problem is the AFC, the AFC is a POS nightmare that should not ever be used, Ever
If the AFC hasnt been professional installed and tuned from the beginning or if the AFC is being used ON TOP OF a tuned ecu then that is your issue.
(Granted if your Wide Band is down stream and not overheating)

You need to make sure your AFC sensor selection is properly configured and the sensor settings are properly selected or the car will run extremely lean and will not react to inputs in the settings for HI and LO throttle maps