Hey guys, I've had my 08 SS TC for a year now and decided to put a downpipe on it. Been running it with superchip tune and AEM cai and never had problems with it. I installed zzp downpipe with highflow cat last week and the car ran well for about 4 days. And now everytime i start it it drops to about 500rpm and goes up to 2000rpm and sometimes stalls. Got a check engine light yesterday when dropped in 3rd on highway, P2270 lean o2 sensor 2 and P0137 low voltage sensor 2. I was wondering if the downpipe could cause the stalling problem since the computer doesn't use the o2 when you start the car. Thanks a lot for the help and sorry for the bad english(frenchy here )

 

double check the connection for the O2 sensor.. i wouldn't think you fried the sensor but hard to say.