Why would Bank 1 fuel differ from Bank 2 fuel

[marseille]

Should AFR's be similar between the banks? They start differing @ 60 and 1,800 rpms and Bank 1 stays richer than Bank 2 as the load increases.

 

[marseille]

Scalars

 

[carabuser]

Never seen different AFR targets between the two banks. Looks like a tuned bin file by someone that's trying to hide a mechanical issue.

Different readings per bank are usually either injectors bad in one bank or the O2 sensors are bad.

 

[marseille]

This really makes me question the tune I currently have in my car and the professional I paid to tune it.

 

[marseille]

I received a base map and four (4) revisions from the tuner. Leveraging the .bin comparison tool in TunerPro it doesn't look like many revisions between each file and these different bank targets existed in each revision, except v1.3 to v1.4 making another Fuel table change to Bank 2 only. Strange.

 

[SlowE93]

Get another Tuna