Hey Dave; I thought about the lack of VSS a few times - but I have set any tune values to 0 as far as throttle follower steps, MPH to enable Idle or large IAC error etc.
Not discounting anyone's...

Thanks Dave and Jim - I ran the IAC adjustment procedure and also opened up the holes in the TPS so I could adjust it to a final TPS of 0.48 V at idle. I changed the TPS V for idle in the tune to...

I did some searching and couldn't find anything like my issue, apologies if I missed something.
Ok; truck is a Bronco II crawler with a Ford 351M, mild cam, nothing crazy, swapped a GM TBI onto it...