So I got the HPtuners connected and everything, Problem 1.) i did a scan on my car ( CEL was on ) threw a lean bank 1 code. 2) I loved my Magnaflow exhaust when i first got it, now i have a Vibrant Header/DP ( high flow. ) ever since i put it on my exhaust seems to sputter? thats really the only way i can explain it. 3) My boost gauge is reading 20psi, i only have the stock SC, with the "stage two package," injen CAI, header, full exhaust. Anyone know what all these things could mean? i was thinking a clogged cat or something... but idk? i need these answers so i can tune my car...

 

yep most likely ur cat is clogged thats why its reading 20 psi

 

really? what would explaing everything else...

 

anyone else?

 

clogged cat explains sputter too