Installed this mod on Monday night, engine threw a CEL on Thursday morning (~150-200 miles since install). I've double checked to make sure I installed the mod correctly and that all of the fittings are tight - everything matches the pictures.

I won't know whether the two are related until I bring it in to have the code read this afternoon, but nothing else has changed about the vehicle - same driving conditions, same fuel, etc.

Anyone have any idea what could be going wrong?