Trying to do a transmission segment swap on my 02 6.0 ls swapped suburban. I have had a 700r4 in it for years. Had a 4l60e built for it. Installed it and started truck up. Ran fine. Found a 02 camaro with the same OS as my 02 pcm. Compared them and clicked on the segment swapper. Clicked the trans and transmission diag and hit import. Saved file. Flashed pcm. Went fine. Tried to start the truck. Would not. Got it running with some throttle. It will. It idle on its own. Have to give it some throttle. Scanned and looked at iac. Showed 0 counts. Flashed it back to the tune that was in it before. Ran normal. Flashed it back to the new file and it will not idle. Any ideas what is happening. Can’t get my tune loaded on here cause my computer is being stupid and won’t hook up to the WiFi. I have a post on the hptuners forum too. It does have my flash on there if you want to look at it. https://forum.hptuners.com/showthrea...nt-swap-needed

This is my first segment swap ever. May be my last if they go like this.

I figured it out. With the old tune it was set as manual. New tune is auto so it has a lot more idle sections. All my idle in p/n were zero. Set all of them I could find to the same as the in gear and it now runs.

What is the blue cat tool? I have looked at a few of the other tunes I have and made all the adjustments I have found that were blank. I really have to get my vss reading correctly now. It’s a Dakota digital sensor with a cable pass threw. At 85 it read 6 mph. So after I add transfer case fluid I can see if my changes helped the vss reading.