Hey everyone, I have recently acquired an S4 TII and I have an S-AFC II lying around and was wondering if it would benefit me if i put it on. It has a 215 LPH fuel pump and I have to disconnect it every time I shut the car off. Could it help me with that problem? Other than that will putting it on be that helpful? Thanks in advance.

 

Yea - you need to either use it or sell it.
You can use it for fuel economy tuning, or power tuning, or both.
A cheap AFR gauge will get you started.