SuperS13
Sonic86
So I have a 2013 chevy sonic 1.8L hatchback and got a zzperformance full exhaust with front pipe and high flow cat and resonator. Sound is nice but not droney, issue I'm having is when I punch the throttle ice beam getting an ammonia/rotten egg smell under load...I've replaced both o2 sensors and checked the main cat...nothing is clogged leading to a bad cat, that being said when I put on a weapon r intake I popped a p0171 and p0420 code when I reverted my bnr ecu tune to stock. And when I took off the weapon r intake and put the bnr tune back in no cel and power was all back...only issue is the ammonia/sulfur smell under wot and when I drive normal exhaust is fine...kinda stumped
