[chrisf]

I am not running the factory O2 sensor. For my AFR gauge, I am running a wide band after the turbo, but it is not in anyway connected to the DME or the rest of the system in anyway.

Upon power up, the gauge defaults to 14.4, and then goes thru a little startup routine. If the sensor is cold it slowly goes to 18 as it warms up. Once the engine is started, it would then drop to 13 or 14 or so....whatever I had dialed in using the screw on the AFM.

If it is warm, when powered up it reads 14.4 and then goes to 18 pretty quickly. Again, starting the engine, it would drop to 13 or 14 or so.

Now....once warmed up it reads 18 and stays there during idle, running. If I give it gas.....it will drop the AFR until I let off the gas...then back to 18.

This is why I think the wide band O2 sensors is still good. I think the AFR issue is somewhere else.

And this sensor, i don't think, has anything to do with poor running on 3&5.