Well...that seems to be a common problem across all brands, not just Stillen.

 

no its not. ive never seen this many cel's on any other car with hfc's.

 

Well I was referring to all brands of HFCs for this car.

 

I had Berk hfc on my Z and now on my G with no cell issues ..

 

I've never read on here about anyone having a CEL return when they followed 1 or all of the following fixes. First, take the proper precautions during install as to not damage an O2 sensor, then if you get a CEL you need to clear the short and long term fuel trims, and reset the learned AF ratio values, and possibly add non-foulers. I've never read, or seen anyone who did all this and had a CEL return. It's not a big issues, and is a pretty easy fix. Get the code read, and that will point you in the direction of which steps to take

 

wait so how would you do clear the short and long term fuel trims and all these other ratios and settings?