running very rich

[LTUDSM]

today my buddy gave me guage style wideband and i noticed that im going realy rich, plus the car lost almoust whole the power.before i had almoust same problem, but it was bad o2 sensor ,so i replaced a new one(OEM Boch),i did a boost leak test ,but nothing came out,i got stock injectors,got no afc or other tuning devices.I don't know where to start to slove this problem,i thought boost leak test would help me but it didn't,so im asking you guys some opinions what should i do?!!

Thanks a lot

 

[awdtalontsi1992]

Could you have an vacuum or exhaust leak possibly...any CELs?

 

[LTUDSM]

well i got some exhaust leaks in 2 or 3 places,but its after the o2 sensor so it wouldnt be a problem,and there is no CEL popping out

 

[andymoraitis]

What reading is the wideband showing you at wide open throttle?

Simply put, if you have a stock fuel system and are running the stock ECU, the best you can hope for is 9.5:1. You need a tuning device (which you don't have) to lean the motor out to a more resonable A/F like 11-11.5:1.

Make sense?

Andy