Ok everybody...…..Got the Coolant sensor replaced, took it for a long drive and it behaved itself. I guess we can call this one fixed. Thanks for everyones help.
Have you ever heard of a plumbers wrench? It's for reaching up to sink faucet connections from the bottom. Worked great for replacing that sensor without removing the intake.
Had the codes read yesterday and it only had one. Coolant temperature sensor. Ordered a new sensor A/C Delco will be here today.
Keep you updated on the results.
I will have to see if any of these yahoo's around here know how to use a scanner. The check engine light will come on for a little while then go back out.
I have a 96 6.5 and it keeps going into high idle all of a sudden. Sitting at a stop sign and it will lunge forward when it does it. Between 40 and 50 mph it keeps down shifting then upshifting continously. Replaced PMD. Got a #9 resister in it. Will 180 degree thermostats cause it to do that...