[lakylester]

Originally Posted by Dackelone

Do you have your JB set to "auto clear". You might be throwing codes and the JB is clearing them before your ECL comes on.

The most common problem when installing downpipes is the tech/mechanic installs the O2 sensors backwards. There are pre cat and post cat O2 sensors.

I'll check when I get home from work if the jb is set to autoclear.

Is there a way to differentiate between the precat and postcat sensors?

Also, I do hear a rattle under the car upon cold start/throttle.

Thanks guys