Ok here's an update.
The check engine light was on.
The dealer fixed some burnt wiring.
I took the truck to National Speed, They did a custom tune, dyno'ed the truck and replaced the secondary O2 wire extension.
First of, the National Speed custom tune is bad ass.I love it. It cut the drone from the exhaust in half. The shift points arnt the same as 5Star. They are about between them and stock. On a cold start, the engine will rev. Like stock, whereas on the 5Star it barks and kicks down to low idle. The throttle response is still there. I'm really digging it.
After the wiring fixes, I still had a check engine light, saying bank 2 sensor 2 was bad. That's the rear driver side O2 sensor. I replaced it last night. Drove it around for a bit, and no light. About a mile or so from the house this morning, it came on.
This time with a P2272 code. O2 Sensor Signal Stuck Lean, Bank 2 Sensor 2.
I know the wiring is good and the sensor is good. I'll call NS later today to see what they can recommend. But I did notice that the driver side exhaust has some black soot leaking out of it down stream of the cat, whereas the passenger side is clean. Don't know if that would be related or not.
Yukon Joe
www.RUNRAPTORRUN.com