After getting these codes:
P0340 Camshaft Position Sensor Circuit Malfunction
P0150 02 Sensor Circuit Malfunction (Bank 2 Sensor I)
P0174 System too Lean (Bank 2)
P1174 Can't find information but I did find this P1174 code
Pending code:
P0134 02 Sensor Circuit No Activity Detected (Bank I Sensor 1)
I recieved the rear o2 sensors (still waiting on front).
I now have black crap that comes out of the exhaust. It is not oily. I am not loosing oil either. It looks like and feels like carbon. Its not running rough or chocking because its being flooded. RPMS are right around the 600 for idle. Just curious if o2 sensors could be doing this or if I have something else going on.
I want to replace the spark plug wires and go with 8mm magnacores wires. Looks like " Bosch Platinum Plus 4's" spark plugs are the ones to use. Are they still good or is there a better one?
Can I get my hands behind the engine to put the wires on the coil pack?? Or do I have some crazy intense challenge ahead of me?!?!

 

The O2 sensors are what makes part of the "closed loop" fuel management, which uses several sensors to adjust the duration of the fuel injector voltage pulse (the pulse width) that precisely controls the quanity of fuel being delivered. A sensor that is out of range or skewed to one edge of the range can make the ECU dump more fuel (run rich) but because the sensor told it to do this the ECU thinks everything is just perfect. IMHO the O2s could make this happen.

As for getting at the coil packs, mounted as they are, people are advised to work carefully and one wire at a time, not much wiggle room, built by aliens with tiny skinny fingers.

 

Once you correct the faults including the front 02, drive it hard and the gas related black smoke will go away. Are you replacing all 4 02's, at your mileage, you should be.
As for the plugs, Plus 4's are good, I ran them for year but I am now running the E3 # 48 plugs and they actually run even better.

 

Will do sir! I am replacing all 4 o2's. I figure it either needs to be done or its coming close...
Thank you for telling me about the E3 #48 plugs! I'm always looking for the better!