Catalytic Converter ?
#12
I did the T-stat before the headers and it helped my sporadic RPM situation...til I did the headers. Also, to maybe clear up the O2 sensor readings...when the front one jumps in voltage the rear one seems to follow right behind it. And Teach, I believe the code was P420...cat inefficiency.
#15
Well, I finally got around to trying out the spark plug anti-foul trick...come to find out, that my rear O2 sensor is too fat to fit through the hole I drilled....I'm back to square one...I did find out that the front O2 sensor is the correct thickness to fit through the anti-fouler...Could I possibly put 2 "front" O2 sensors in my truck? or would the ECM go bananas? The connectors are exactly the same so I was tempted to give it a shot but not sure if it would cause any damage.