I agree, the cat may be masking the problem.

The O2 is a Bosch replacement that's about four years old (there is only one, in the manifold). The shop said they checked it and it was good, but I'm not sure what they did to check it. I haven't shown any codes for O2. Not sure if that means it's okay or not.


[color:"darkgreen"]1986 4Runner - 4" IFS - 63" Chevys - 33" ATs - 5.29s - Rear Detroit
Sliders - Kayline - Rebuilt 22RE - On Board Air AND Factory AC
www.xtremefabricator.com[/color]