First attempt: Catless with 10* timing
Second attempt: Cat with 13* timing (changed to 13 in hopes of running less rich and getting a better test)
I've been recommended to drive until tank is 1/4th full, put in 2 bottles of heet, and fill with 87 octane fuel instead of 91. Since I am still at stock boost and been told it burns faster.
Contemplating replacing O2 sensor.. Cat is only a year old and probably has 1 month of use on it.
Second attempt: Cat with 13* timing (changed to 13 in hopes of running less rich and getting a better test)
I've been recommended to drive until tank is 1/4th full, put in 2 bottles of heet, and fill with 87 octane fuel instead of 91. Since I am still at stock boost and been told it burns faster.
Contemplating replacing O2 sensor.. Cat is only a year old and probably has 1 month of use on it.