Gentleman thanks for the input …
I assume that the code “Oxygen Sensor - system indicates full rich” means just that, that the sensor is detecting a too (full) rich air mixture passing by it.
The sensor is heated. Is there a relay and how would I check that? The sensor does have a insulation sleeve.
*“Have you back probed the o2 sensor to see what the actual reading is when the fault is thrown?” Robin can you give me a little more information on doing that please.
I do have a very slight stumble when idling.
Could one of my injectors be the problem, that is a possibility. I have a new set of injectors that I can pop in and see what happens.
So where to go from here? …
I think I’ll start by pulling all the spark plugs and checking them. While I’m at it I’ll pull a compression check. The machinist who rebuilt my head took great pains in setting the valve clearances and so I just
installed it and moved on. Perhaps I needed to recheck the clearances after the head was bolted down?
I bought a new front CAT thinking that if the old one is partially blocked that “could” be causing this? The trouble is I can’t get to one of the bolts to remove the old one and install the new one. I took the car to a muffler shop and they couldn’t figure it out either. It almost looks like I’ll have to remove the two exhaust headers and pull the CAT out still attached to them … ouch !
VERY FRUSTRATING !