Discussion Starter · #1 ·
I have High flow cats, Longtubes, Cai, and a Bama tune, I am getting the catylist inefficency code 430, I installed the system last week. When I did the exhaust on my truck, 97-F150 I welded washers in front if the rear 02 sensor's inside the pipes and that took care of my check engine light, has anyone tried this, will it work? what about those 90 degree fittings that claim to reduce flow to the sensor. What exactly does the rear o2 sensor measure, if it's flow, I would think it will work.