all the pins of the OBD connector are fine. Still can't connect. There's only 4 wires, and all are correct.

I'll check the power of the MAF and Ign coils. I know I haven't done anything with either of these that was "custom", so maybe there's issues here. I'll check them out. Brand new Walbro FP in the truck. Not really any differences, although I've yet to have the stumbling issue since.

C/C works fine now. No issues with this.

Still have yet to work on my A/C. I'm still researching this one.

thanks for the info. I still have not heard from ORS, so I'm pretty much dead in the water on my OBD connectivity.