Okay, updates....someone on a FB group managed to pull these Mode $6 definition for the 04 Rubicon.
Sensor System Monitors
11 02 Sensor 1/1 Half-Cycle Switch Counter
31 02 Sensor 2/1 Half-Cycle Switch Counter
Purge System Monitors
51: Purge Monitor @ IAC shift
52: Purge Monitor Adaptive Fuel Shift
53: Purge Monitor RPM Shift
EVAP System Monitors
.040" Leak Detection Pump Period
.020" Leak Detection Pump Period
When I look into the Half-Cycle Switch Counter issue, I came across this informative video
which related directly to the upstream 02 sensor.
As I look at my data, it seems that I am running way too lean. This is informative, but I'm unsure as to *why* I am running lean and was wondering if an aftermarket throttle bottle spacer would contribute to this problem?
Thoughts?