Can someone help me with this...after installing new Kinetix cats I now have a P1074 Bank 2 Lean code, other then a slight leak at the rear flange for the muffler I didn't have a problem ..anyone else experience this after installing hi flow cats? Thanks for any help you can give me.

 

Are you positive you do not have a leak upstream of the O2's?

 

I can't say I'm 100% positive without having done any leak test, but it just seems strange that the code was thrown right after installing the cats ( 20 miles )

 

Ok checked today didn't hear any hissing ...sprayed around vacuum lines ect...no change in idle...cleaned MAF sensor cleared code drove 1/2 hour code came back