Georgeb
Full Access Member
- Joined
- Apr 30, 2015
- Posts
- 3,259
- Reaction score
- 214
- Location
- Wisconsin
- First Name
- George
- Truck Year
- 2003
- Truck Model
- K10 Burb Z71
- Engine Size
- 5.3
More testin has indicated that bank one and two front O2 sensors are reading like they should and with the cats lit the rear sensors are aslo reading as they should. As the front ones follow the fuel trim the rears stay nice and steady. So the cats seem to be liting and working the same since the numbers match for both sides. I guess they are just not quite efficient enough. I changed the stat so now I reach 186 deg at idle and I plan to try some Cataclean on a 1/4 tank to improve the cat function. Will see....