how did you check the temp sensor? it is seperate from the sensor for the guage in the dash,. it is located at the front of the motor,. sensor for the guage is in the cyl head,.I've sent Bryan Herter all of my information for tuning my pcm. I have replaced the MAF and the temp sensor is functioning properly. Don't know what else to do at this point.
It's been my experience that over rich still fires on all eight even in overdrive etc,. but uses waay too much fuel,.along with poor performance etc,.
How did you arrive at the original diagnosis of "too rich" ??