I resently switched my fiero with a 2.3l quad-4 1990 ecm to a 7749 using a code59 bin from a turbo 4.3l v6 s10. First drive was ok but to rich. After a mile or so it wouldn't idle, just dies when pushing clutch in. After each start up It has a high idle for less than a minute then lowers a bit then slows a little more then just about the time u think it's gonna keep an idle it just dies like u turn off the key. I can make it rich or lean, adjust timing and play with iac steps but always dies at about the same time interval. I'm looking at all the time related idle settings but haven't changed the right one yet. I recorded a video of it I'll try to post. Can anyone point me in the right direction?Any help is always greatly appreciated !!!